Feat/bull

[nafsonig]

Changes implemented
✅ Queue configuration
Updated onchain.module.ts

Added defaultJobOptions for the onchain queue:
attempts: 5
exponential backoff
removeOnComplete retention policy
removeOnFail retention policy
Added an onchain-dead-letter queue registration for failed jobs.
Updated onchain.service.ts

Configured removeOnComplete and removeOnFail options for onchain job creation.
✅ Dead Letter Queue logic
Updated onchain.processor.ts
Added detection for transient onchain errors like network timeouts and ledger congestion.
Added final-failure handling to move jobs into the onchain-dead-letter queue after all retries are exhausted.
Added logging for dead-letter transitions and transient failure warnings.
✅ Job monitoring endpoint/service
Added jobs-monitor.service.ts

Provides queue health information for verification, notifications, onchain, and onchain-dead-letter.
Includes readiness state and queue counts.
Updated jobs.controller.ts

Uses the new service to expose queue health.
Routes available at GET /jobs/status and GET /jobs/health.
Updated jobs.module.ts

Added JobsMonitorService provider.

Closes #230

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[Cedarich]

@nafsonig fix build

Run pnpm --filter backend run build

backend@0.0.1 build /home/runner/work/Soter/Soter/app/backend
node ../../node_modules/@nestjs/cli/bin/nest.js build
src/jobs/jobs-monitor.service.ts:39:15 - error TS2339: Property 'isReady' does not exist on type 'Queue<any, any, string, any, any, string>'.
39 queue.isReady(),
~~~~~~~
Found 1 error(s).
/home/runner/work/Soter/Soter/app/backend:
 ERR_PNPM_RECURSIVE_RUN_FIRST_FAIL  backend@0.0.1 build: node ../../node_modules/@nestjs/cli/bin/nest.js build
Exit status 1
Error: Process completed with exit code 1.