feat(ci): chained promotion PRs with multi-agent Claude review (#776)

* feat(ci): chained promotion PRs with multi-agent Claude review [skip-regression-check]

Staging CI workflow with batched promotion PRs:
- Creates staging-promote/<sha> branches per batch
- Chains PRs onto previous promotion branch (incremental diffs)
- Claude Code reviews only the incremental changes per batch
- Blocked PRs stay open as records of findings
- staging-tested tag advances regardless of gate outcome
- Runs every 60 min on cron + manual dispatch

Multi-agent Claude review (Sonnet orchestrator + Haiku agents):
- 4 parallel Sonnet review agents (security, architecture, bugs, performance)
- Haiku agents for severity/confidence scoring
- [SEVERITY:CONFIDENCE] output format
- Severity/confidence matrix for issue creation and gate blocking:
  CRITICAL: always create issue, block if confidence >=80
  HIGH: create issue if confidence >=50
  MEDIUM/LOW: create issue if confidence >=80

.github/workflows/test.yml

@@ -1,5 +1,6 @@
 name: Run Tests
 on:
+  workflow_call:
   pull_request:
   push:
     branches:
@@ -38,6 +39,9 @@ jobs:
 
   telegram-tests:
     name: Telegram Channel Tests
+    if: >
+      github.event_name == 'push' ||
+      (github.event_name == 'pull_request' && github.base_ref != 'staging')
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
@@ -50,6 +54,9 @@ jobs:
 
   windows-build:
     name: Windows Build (${{ matrix.name }})
+    if: >
+      github.event_name == 'push' ||
+      (github.event_name == 'pull_request' && github.base_ref != 'staging')
     runs-on: windows-latest
     strategy:
       fail-fast: false
@@ -74,6 +81,9 @@ jobs:
 
   wasm-wit-compat:
     name: WASM WIT Compatibility
+    if: >
+      github.event_name == 'push' ||
+      (github.event_name == 'pull_request' && github.base_ref != 'staging')
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
@@ -94,6 +104,9 @@ jobs:
 
   docker-build:
     name: Docker Build
+    if: >
+      github.event_name == 'push' ||
+      (github.event_name == 'pull_request' && github.base_ref != 'staging')
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
@@ -123,12 +136,22 @@ jobs:
     needs: [tests, telegram-tests, wasm-wit-compat, docker-build, windows-build, version-check]
     steps:
       - run: |
-          if [[ "${{ needs.tests.result }}" != "success" || "${{ needs.telegram-tests.result }}" != "success" || "${{ needs.wasm-wit-compat.result }}" != "success" || "${{ needs.docker-build.result }}" != "success" || "${{ needs.windows-build.result }}" != "success" ]]; then
-            echo "One or more jobs failed"
-            exit 1
-          fi
-          # version-check only runs on PRs, so skip/success are both acceptable
-          if [[ "${{ needs.version-check.result }}" == "failure" ]]; then
-            echo "Version bump check failed"
+          # Unit tests must always pass
+          if [[ "${{ needs.tests.result }}" != "success" ]]; then
+            echo "Unit tests failed"
             exit 1
           fi
+          # Gated jobs: must pass on promotion PRs / push, skipped on developer PRs
+          for job in telegram-tests wasm-wit-compat docker-build windows-build version-check; do
+            case "$job" in
+              telegram-tests) result="${{ needs.telegram-tests.result }}" ;;
+              wasm-wit-compat) result="${{ needs.wasm-wit-compat.result }}" ;;
+              docker-build) result="${{ needs.docker-build.result }}" ;;
+              windows-build) result="${{ needs.windows-build.result }}" ;;
+              version-check) result="${{ needs.version-check.result }}" ;;
+            esac
+            if [[ "$result" == "failure" || "$result" == "cancelled" ]]; then
+              echo "$job failed"
+              exit 1
+            fi
+          done