fix(release): separate artifact and source contracts

tools/checks/check-release-integration.sh

@@ -197,40 +197,8 @@ print(f"Release refs and metadata passed for {len(python_requirements)} Python p
 PY
 
 run_step "Validate installed module manifests and registry"
-"$PYTHON" - <<'PY'
-from __future__ import annotations
-
-import sys
-from govoplan_core.server.registry import available_module_manifests, build_platform_registry
-
-expected = {
-    "access",
-    "admin",
-    "audit",
-    "calendar",
-    "campaigns",
-    "dashboard",
-    "docs",
-    "files",
-    "identity",
-    "idm",
-    "mail",
-    "ops",
-    "organizations",
-    "policy",
-    "tenancy",
-}
-
-manifests = available_module_manifests()
-missing = sorted(expected - set(manifests))
-if missing:
-    print(f"Missing installed module manifests: {', '.join(missing)}", file=sys.stderr)
-    raise SystemExit(1)
-
-registry = build_platform_registry(tuple(sorted(expected)))
-snapshot = registry.validate()
-print("Registry modules:", ", ".join(manifest.id for manifest in snapshot.manifests))
-PY
+"$PYTHON" "$META_ROOT/tools/checks/release_integration.py" artifacts \
+  --requirements "$META_ROOT/requirements-release.txt"
 
 run_step "Generate release dependency provenance"
 "$PYTHON" "$META_ROOT/tools/release/generate-release-sbom.py" \
@@ -280,12 +248,8 @@ for repo in govoplan-mail govoplan-calendar govoplan-campaign; do
 done
 
 run_step "Run core backend release tests"
-"$PYTHON" -m unittest \
-  tests.test_module_system \
-  tests.test_access_contracts \
-  tests.test_identity_organization_contracts \
-  tests.test_core_events \
-  tests.test_policy_contracts
+"$PYTHON" "$META_ROOT/tools/checks/release_integration.py" core-tests \
+  --core-root "$ROOT"
 "$PYTHON" "$META_ROOT/tools/checks/check_dependency_boundaries.py"
 
 run_step "Run cloned module backend tests"