fix(compose-doctor): resolve effective healthcheck coverage (#1713)

* fix(compose-doctor): resolve effective healthcheck coverage

Compose Doctor now classifies healthcheck coverage from the Compose model, running containers, and local images so image-provided HEALTHCHECKs are not false positives. Update Guard shares the same presence helper so test NONE is not treated as active.

* fix(compose-doctor): fix healthcheck project label and empty compose HC

Use the Compose project name for runtime container listing so stacks whose name: differs from the directory still get runtime evidence. Treat empty or timing-only healthcheck objects as absent rather than active.

* fix(compose-doctor): treat inherited healthcheck as All Clear note

Inherited image healthchecks no longer block All Clear; they surface under a notes section and cannot be acknowledged.

backend/src/routes/stacks.ts

@@ -27,7 +27,7 @@ import { enforcePolicyPreDeploy } from '../services/PolicyEnforcement';
 import { buildStackDriftReport, type DriftFindingKind, type StackDriftReport } from '../services/DriftDetectionService';
 import { DriftLedgerService, type DriftTemporal } from '../services/DriftLedgerService';
 import { ComposeDoctorService } from '../services/ComposeDoctorService';
-import { RULE_IDS } from '../services/preflight/rules';
+import { RULE_IDS, isPreflightNoteFinding } from '../services/preflight/rules';
 import { parseServiceImages, isPreflightAckActive } from '../utils/preflight-ack-filter';
 import type { PreflightAckExpiryMode } from '../services/DatabaseService';
 import { buildStackNetworkFacts } from '../services/network/composeNetworkInspector';
@@ -1417,6 +1417,10 @@ stacksRouter.post('/:stackName/preflight/acknowledgements', async (req: Request,
     res.status(400).json({ error: 'ruleId must be a known Compose Doctor rule id' });
     return;
   }
+  if (isPreflightNoteFinding(ruleId)) {
+    res.status(400).json({ error: 'Informational notes cannot be acknowledged' });
+    return;
+  }
   const serviceRaw = body.service == null || body.service === ''
     ? null
     : String(body.service).trim();