feat: persist execution logs + dashboard detail view + integration tests

Three threads landing together because they share a public surface
(the new execution_log shape) and verifying any one in isolation
would mean re-doing the work later.

== (A) execution log persistence ==

  * shared::ExecutionLog + ExecutionStatus carry the audit-trail
    shape that flows from the orchestrator through the sink and
    back out via the manager's logs endpoint.

  * shared::ExecutionLogSink trait — abstraction the orchestrator
    writes through. In single-process MVP mode the manager's
    Postgres-backed impl is plugged in directly; in cluster mode
    (v1.3+) the orchestrator's impl will post over HTTP to the
    manager. Trait lives in `shared` so neither *-core crate has
    to know about the other.

  * manager-core::PostgresExecutionLogSink writes to the
    execution_logs table (already in the initial migration);
    PostgresExecutionLogRepository reads them back, paginated.
    AdminState now carries both a script repo and a log repo, so
    `admin_router` exposes `GET /scripts/{id}/logs?limit=&offset=`
    capped at 200 rows per page to keep the dashboard responsive.

  * orchestrator-core::DataPlaneState gains `log_sink`. The
    execute handler builds an ExecutionLog on every outcome —
    success, error, timeout, budget-exceeded — and awaits the
    sink. Sink failures are logged at warn and DO NOT mask the
    user-facing result, since "we couldn't write the audit row"
    is a separate concern from "the script ran".

  * picloud binary refactored into a lib (`build_app(pool)` is
    the seam) + thin bin shell. Same Postgres pool backs the
    script repo, the log repo, and the sink — no double pool.

== (B) dashboard ==

  * Typed API client extended with `scripts.logs(id, opts)`,
    `scripts.update/remove`, and `execute(id, body, headers)`.
    Plain `fetch` wrapper now surfaces server-side error
    messages via a typed ApiError so the UI can render them.

  * `/` — create-script form now actually creates; on success
    the list reloads. List entries link to detail.

  * `/scripts/[id]` — new detail route: source editor with save
    (calls update, version bumps); Test invoke panel that sends
    arbitrary JSON body + headers to /api/execute and shows the
    response; Recent executions panel reading from /logs with
    expandable per-row request/response/script-log views.
    Delete button with confirm. SPA-routed; Caddy serves
    `build/` with the same index.html fallback.

== (C) integration tests ==

  * crates/picloud/tests/api.rs — 14 sqlx::test cases driving
    `build_app` through an axum_test::TestServer against a fresh
    Postgres DB per test. Covers: health, full script CRUD,
    duplicate-name conflict, invalid-source rejection on both
    create and update, execute echoing the body, status+header
    passthrough, 404 on missing scripts, error-path executions
    landing in the audit log with the right status.

  * Tests are `#[ignore]` by default so plain `cargo test
    --workspace` stays green without infrastructure. Opt-in via:
    `docker compose up -d postgres && \
       DATABASE_URL=postgres://picloud:picloud@127.0.0.1:15432/picloud \
       cargo test -p picloud --test api -- --include-ignored`

Verified live through Caddy on :8000: three logged invocations
land in the logs endpoint with the right structured `data` on
each `log::info`/`log::warn`, error-path executions are still
captured with status=error, dashboard list + SPA detail route
both reachable.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Cargo.lock

@@ -46,6 +46,16 @@ version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
 
+[[package]]
+name = "assert-json-diff"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47e4f2b81832e72834d7518d8487a0396a28cc408186a2e8854c0f98011faf12"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "async-trait"
 version = "0.1.89"
@@ -81,6 +91,12 @@ version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
 
+[[package]]
+name = "auto-future"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c1e7e457ea78e524f48639f551fd79703ac3f2237f5ecccdf4708f8a75ad373"
+
 [[package]]
 name = "autocfg"
 version = "1.5.1"
@@ -139,6 +155,36 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "axum-test"
+version = "17.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eb1dfb84bd48bad8e4aa1acb82ed24c2bb5e855b659959b4e03b4dca118fcac"
+dependencies = [
+ "anyhow",
+ "assert-json-diff",
+ "auto-future",
+ "axum",
+ "bytes",
+ "bytesize",
+ "cookie",
+ "http",
+ "http-body-util",
+ "hyper",
+ "hyper-util",
+ "mime",
+ "pretty_assertions",
+ "reserve-port",
+ "rust-multipart-rfc7578_2",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "smallvec",
+ "tokio",
+ "tower",
+ "url",
+]
+
 [[package]]
 name = "base64"
 version = "0.22.1"
@@ -193,6 +239,12 @@ version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e748733b7cbc798e1434b6ac524f0c1ff2ab456fe201501e6497c8417a4fc33"
 
+[[package]]
+name = "bytesize"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6bd91ee7b2422bcb158d90ef4d14f75ef67f340943fc4149891dcce8f8b972a3"
+
 [[package]]
 name = "cc"
 version = "1.2.62"
@@ -264,6 +316,16 @@ dependencies = [
  "tiny-keccak",
 ]
 
+[[package]]
+name = "cookie"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ddef33a339a91ea89fb53151bd0a4689cfce27055c291dfa69945475d22c747"
+dependencies = [
+ "time",
+ "version_check",
+]
+
 [[package]]
 name = "core-foundation-sys"
 version = "0.8.7"
@@ -336,6 +398,21 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "deranged"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7cd812cc2bc1d69d4764bd80df88b4317eaef9e773c75226407d9bc0876b211c"
+dependencies = [
+ "powerfmt",
+]
+
+[[package]]
+name = "diff"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -1082,6 +1159,12 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "num-conv"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "521739c6d2bac4aa25192232afe6841231376b2b26d4d9fae5ecf8ca5772e441"
+
 [[package]]
 name = "num-integer"
 version = "0.1.46"
@@ -1195,6 +1278,7 @@ dependencies = [
  "anyhow",
  "async-trait",
  "axum",
+ "axum-test",
  "figment",
  "picloud-executor-core",
  "picloud-manager-core",
@@ -1300,6 +1384,7 @@ dependencies = [
 name = "picloud-shared"
 version = "0.1.0"
 dependencies = [
+ "async-trait",
  "chrono",
  "serde",
  "serde_json",
@@ -1361,6 +1446,12 @@ dependencies = [
  "zerovec",
 ]
 
+[[package]]
+name = "powerfmt"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.21"
@@ -1370,6 +1461,16 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "pretty_assertions"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ae130e2f271fbc2ac3a40fb1d07180839cdbbe443c7a27e1e3c13c5cac0116d"
+dependencies = [
+ "diff",
+ "yansi",
+]
+
 [[package]]
 name = "prettyplease"
 version = "0.2.37"
@@ -1610,6 +1711,15 @@ dependencies = [
  "webpki-roots 1.0.7",
 ]
 
+[[package]]
+name = "reserve-port"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94070964579245eb2f76e62a7668fe87bd9969ed6c41256f3bf614e3323dd3cc"
+dependencies = [
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "rhai"
 version = "1.24.0"
@@ -1674,6 +1784,21 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "rust-multipart-rfc7578_2"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c839d037155ebc06a571e305af66ff9fd9063a6e662447051737e1ac75beea41"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-util",
+ "http",
+ "mime",
+ "rand 0.9.4",
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "rustc-hash"
 version = "2.1.2"
@@ -2249,6 +2374,37 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "time"
+version = "0.3.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "743bd48c283afc0388f9b8827b976905fb217ad9e647fae3a379a9283c4def2c"
+dependencies = [
+ "deranged",
+ "itoa",
+ "num-conv",
+ "powerfmt",
+ "serde_core",
+ "time-core",
+ "time-macros",
+]
+
+[[package]]
+name = "time-core"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7694e1cfe791f8d31026952abf09c69ca6f6fa4e1a1229e18988f06a04a12dca"
+
+[[package]]
+name = "time-macros"
+version = "0.2.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e70e4c5a0e0a8a4823ad65dfe1a6930e4f4d756dcd9dd7939022b5e8c501215"
+dependencies = [
+ "num-conv",
+ "time-core",
+]
+
 [[package]]
 name = "tiny-keccak"
 version = "2.0.2"