feat(P26): 3 platform pipelines + release job with semver/tag updates

Phase 26 — platform-pipelines-and-release-automation:

- platform-test.yml: PR pipeline (lint + unit-test + integration-test +
  schema-validation) replacing ci.yml for PRs; integration-test runs
  run_platform.sh --check-only for every contracts/*.yaml
- primitives-plan.yml: PR pipeline with matrix over all 9 L1 primitives
  (s3, vpc, ecs-cluster, ecs-service, iam-role, alb, ecr, cloudfront, waf)
- patterns-plan.yml: PR pipeline with matrix over all 2 L2 modules
  (static-assets, microservice)
- release.yml: push-to-main pipeline computing next semver tag (PATCH for
  regular phases, MINOR for milestone completions), updating floating
  MAJOR.MINOR + MAJOR tags, and creating GitHub releases
- run_primitive_plan.sh: plan-only/check-only runner for a single L1
  primitive (adapter compile + structure validation offline)
- run_pattern_plan.sh: plan-only/check-only runner for a single L2 pattern
  (environment check + contract validate + resolve + adapter + structure
  validation offline)
- contracts/microservice.yaml: sample consumer contract for the
  microservice L2 module (schema-compliant scalar inputs)
- instance.json for 8 L1 primitives (vpc, ecs-cluster, ecs-service,
  iam-role, alb, ecr, cloudfront, waf) so the primitives-plan matrix can
  run the adapter offline; s3 already had one
- tests/test_release_logic.py: unit test for semver computation
  (PATCH bump, MINOR bump on milestone, floating tag format)
- tests/test_pipeline_contract.py: 19 new tests validating the 4 platform
  workflows exist and conform (stages, matrices, triggers, permissions)

DEVIATION: The microservice pattern (run_pattern_plan.sh --check-only
microservice + run_platform.sh --check-only contracts/microservice.yaml)
fails at the adapter stage due to a pre-existing resolver ref-id mismatch
for multi-resource L1s (resolver emits ref:vpc.subnet_ids but the expanded
resource id is vpc-subnet). This predates Phase 26 and is out of scope for
pipeline automation; the static-assets pattern passes end-to-end. The
microservice contract is schema-valid and resolves correctly (11
resources); only the adapter compilation of multi-resource L1 refs fails.

VERIFICATION:
- bash scripts/run_ci.sh: PASS (lint + test + check-only)
- python3 -m pytest tests/ -v: 266 passed
- bash scripts/run_primitive_plan.sh --check-only s3: PASS
- bash scripts/run_pattern_plan.sh --check-only static-assets: PASS
- All 9 primitives pass run_primitive_plan.sh --check-only
- All instance.json validate against stack.schema.json

---ci---
project: acdl
phase: 26
milestone: v1.7
status: execute
---/ci---

.github/workflows/release.yml

@@ -0,0 +1,92 @@
+# ACDL Release Pipeline — GitHub Actions (production)
+#
+# Runs on push to main. Computes the next semver tag from the latest tag +
+# commit history, creates the tag, updates floating MAJOR.MINOR and MAJOR tags,
+# and creates a GitHub release with auto-generated notes.
+#
+# Semver policy:
+#   - Regular phase commit -> bump PATCH (v1.6.0 -> v1.6.1)
+#   - Milestone completion ("docs(milestone): complete") -> bump MINOR (v1.6.1 -> v1.7.0)
+#   - Major bumps are manual (not implemented here).
+name: acdl-release
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  release:
+    name: Compute semver + update tags
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # need full history for tag computation
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Compute next version
+        id: version
+        run: |
+          # Get the latest tag
+          LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
+          echo "Latest tag: $LATEST_TAG"
+
+          # Parse the version
+          MAJOR=$(echo "$LATEST_TAG" | sed -n 's/v\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)/\1/p')
+          MINOR=$(echo "$LATEST_TAG" | sed -n 's/v\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)/\2/p')
+          PATCH=$(echo "$LATEST_TAG" | sed -n 's/v\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)/\3/p')
+
+          # Check if this is a milestone completion (look for "docs(milestone): complete" in the latest commits)
+          if git log --format='%s' -5 | grep -q 'docs(milestone): complete'; then
+            # Milestone completion -> bump minor
+            MINOR=$((MINOR + 1))
+            PATCH=0
+          else
+            # Regular phase -> bump patch
+            PATCH=$((PATCH + 1))
+          fi
+
+          NEW_TAG="v${MAJOR}.${MINOR}.${PATCH}"
+          MAJOR_MINOR_TAG="v${MAJOR}.${MINOR}"
+          MAJOR_TAG="v${MAJOR}"
+
+          echo "new_tag=$NEW_TAG" >> $GITHUB_OUTPUT
+          echo "major_minor_tag=$MAJOR_MINOR_TAG" >> $GITHUB_OUTPUT
+          echo "major_tag=$MAJOR_TAG" >> $GITHUB_OUTPUT
+          echo "Next version: $NEW_TAG"
+
+      - name: Create version tag
+        run: |
+          git tag ${{ steps.version.outputs.new_tag }}
+          git push origin ${{ steps.version.outputs.new_tag }}
+
+      - name: Update floating MAJOR.MINOR tag
+        run: |
+          git tag -f ${{ steps.version.outputs.major_minor_tag }} ${{ steps.version.outputs.new_tag }}
+          git push origin ${{ steps.version.outputs.major_minor_tag }} --force
+
+      - name: Update floating MAJOR tag
+        run: |
+          git tag -f ${{ steps.version.outputs.major_tag }} ${{ steps.version.outputs.new_tag }}
+          git push origin ${{ steps.version.outputs.major_tag }} --force
+
+      - name: Create GitHub release
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          # Generate release body from commit history since last tag
+          PREV_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
+          if [ -n "$PREV_TAG" ]; then
+            BODY=$(git log --format='- %s' "$PREV_TAG"..HEAD)
+          else
+            BODY=$(git log --format='- %s' HEAD)
+          fi
+          gh release create ${{ steps.version.outputs.new_tag }} \
+            --title "ACDL ${{ steps.version.outputs.new_tag }}" \
+            --notes "$BODY" \
+            --generate-notes || true