identity-service Container Setup & DB Bootstrapping (US-4.1) - 2 SP

[sainijit]

User story
As a developer, I want to bootstrap the identity-service container footprint on port 8022 and prepare SQLite and FAISS persistence layers for biometric indexing.

Affected Components / Files

• docker-compose.yml
• identity-service/

Key Technical Tasks

• Add service in compose config.
• Prepare schemas and indexes (face_index.bin, voice_index.bin).
• Write YAML parser for user profiles if BOOTSTRAP_ON_START is true.

Acceptance Criteria

• Container builds and initializes. SQLite tables are populated with test users and files are generated on startup.

Estimate: 2 SP