chore(v1.1.5): version bumps, CI workflow, schema-snapshot un-ignore

- Workspace 1.1.4 → 1.1.5; SDK 1.5 → 1.6; dashboard 0.10.0 → 0.11.0.
- CHANGELOG v1.1.5 entry; CLAUDE.md runtime-config table gains
  PICLOUD_FILES_ROOT + PICLOUD_FILES_MAX_FILE_SIZE_BYTES.
- schema_snapshot test: drop #[ignore] + #[sqlx::test]; run against
  DATABASE_URL when set, skip cleanly when absent. Re-blessed golden
  picks up files / files_trigger_details / pubsub_trigger_details, the
  two widened CHECKs, and the pubsub partial index.
- First CI workflow (.github/workflows/ci.yml): postgres:15 service +
  fmt + clippy + cargo test --workspace; separate dashboard check job.
- Add files/pubsub admin-trigger reject-coverage tests (module +
  cross-app + bad-pattern), mirroring the v1.1.3 regression set.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -118,6 +118,8 @@ Environment variables consumed by the `picloud` binary:
 | `DATABASE_URL` | — | Required. Postgres connection string. |
 | `PICLOUD_SESSION_TTL_HOURS` | `24` | Sliding-window session lifetime. |
 | `PICLOUD_SANDBOX_MAX_*` | conservative defaults | Per-knob admin ceilings on Rhai sandbox overrides. See `manager-core::sandbox::SandboxCeiling`. |
+| `PICLOUD_FILES_ROOT` | `./data` | Filesystem root for `files::*` blob storage (v1.1.5). Bytes live at `<root>/files/<app_id>/<collection>/<id[0:2]>/<id>`; metadata in Postgres. |
+| `PICLOUD_FILES_MAX_FILE_SIZE_BYTES` | `104857600` (100 MB) | Per-file hard size cap for `files::*` (v1.1.5). Per-app quotas deferred to v1.2. |
 
 ## Out of MVP