refactor: DB schema fixes + container renames + compose include + audit sprint

- FindingsLedger: change schema from public to findings (V3-01)
- Add 9 migration module plugins: RiskEngine, Replay, ExportCenter, Integrations, Signer, IssuerDirectory, Workflow, PacksRegistry, OpsMemory (V4-01 to V4-09)
- Remove 16 redundant inline CREATE SCHEMA patterns (V4-10)
- Rename export→export-web, excititor→excititor-web for consistency
- Compose stella-ops.yml: thin wrapper using include: directive
- Fix dead /api/v1/jobengine/* gateway routes → release-orchestrator/packsregistry
- Scheduler plugin architecture: ISchedulerJobPlugin + ScanJobPlugin + DoctorJobPlugin
- Create unified audit sink sprint plan
- VulnExplorer integration tests + gap analysis

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

devops/helm/stellaops/values-dev.yaml

@@ -172,8 +172,8 @@ services:
         mountPath: /app/etc/notify.yaml
         subPath: notify.yaml
         configMap: notify-config
-  excititor:
-    image: registry.stella-ops.org/stellaops/excititor@sha256:d9bd5cadf1eab427447ce3df7302c30ded837239771cc6433b9befb895054285
+  excititor-web:
+    image: registry.stella-ops.org/stellaops/excititor-web@sha256:d9bd5cadf1eab427447ce3df7302c30ded837239771cc6433b9befb895054285
     env:
       EXCITITOR__CONCELIER__BASEURL: "https://stellaops-concelier:8445"
       EXCITITOR__STORAGE__DRIVER: "postgres"