chore(release): bump workspace to v1.1.1 + CHANGELOG

- Workspace package version: 1.1.0 → 1.1.1 (patch under the
  post-1.0 expansion-phase carve-out in docs/versioning.md)
- Rhai SDK version: 1.1 → 1.2 — minor bump, additive only.
  New surfaces: kv::*, dead_letters::*, ctx.event.
- Dashboard package version: 0.6.0 → 0.7.0 for the dead-letters UI.
- HTTP API version stays at 1 (additive: trigger CRUD, dead-letter
  admin endpoints, dispatch_mode field on routes).
- Schema version: 6 → 12 (migrations 0007–0012).

CHANGELOG.md created at the repo root following the convention from
prior bumps (release commits + design-notes references).

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

Cargo.lock

@@ -1505,7 +1505,7 @@ checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 
 [[package]]
 name = "picloud"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -1531,7 +1531,7 @@ dependencies = [
 
 [[package]]
 name = "picloud-cli"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "anyhow",
  "assert_cmd",
@@ -1552,7 +1552,7 @@ dependencies = [
 
 [[package]]
 name = "picloud-executor"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "anyhow",
  "picloud-executor-core",
@@ -1564,7 +1564,7 @@ dependencies = [
 
 [[package]]
 name = "picloud-executor-core"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "async-trait",
  "base64",
@@ -1585,7 +1585,7 @@ dependencies = [
 
 [[package]]
 name = "picloud-manager"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "anyhow",
  "picloud-manager-core",
@@ -1597,7 +1597,7 @@ dependencies = [
 
 [[package]]
 name = "picloud-manager-core"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "argon2",
  "async-trait",
@@ -1622,7 +1622,7 @@ dependencies = [
 
 [[package]]
 name = "picloud-orchestrator"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "anyhow",
  "picloud-orchestrator-core",
@@ -1634,7 +1634,7 @@ dependencies = [
 
 [[package]]
 name = "picloud-orchestrator-core"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "async-trait",
  "axum",
@@ -1653,7 +1653,7 @@ dependencies = [
 
 [[package]]
 name = "picloud-shared"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "async-trait",
  "chrono",