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/compose/docker-compose.crypto-provider.cryptopro.yml

@@ -136,7 +136,7 @@ services:
       com.stellaops.crypto.provider: "cryptopro"
 
   # Excititor - Use CryptoPro for VEX signing
-  excititor:
+  excititor-web:
     environment:
       <<: *cryptopro-env
     depends_on: