asset-sync-service portfolio polish

Patch release for portfolio and release-readiness polish.

• README portfolio polish
• Added screenshots/assets
• Added GitHub Actions CI workflow
• Aligned README roadmap with CI vs CD/deployment status
• No runtime/backend behavior changes after v0.1.0

asset-sync-service MVP

asset-sync-service MVP

Initial MVP release for synchronizing public account, watched-address, and observed transaction lifecycle state.

Includes:

• Account and watched-address APIs
• Observed event ingestion
• Idempotent transaction state transitions
• Confirmation and reorg handling
• Transactional outbox with local publisher
• Fake provider sync by address/account
• Sync run lookup
• PostgreSQL/Liquibase/jOOQ persistence
• Scheduled outbox poller with retry/backoff
• Actuator health, readiness, metrics, and OpenAPI docs
• Docker Compose packaging and local run documentation

Deferred:

• Real chain providers
• Transaction read/list endpoints
• External broker publishing
• Balance projection
• Auth and multitenancy
• Custody/signing/private key handling