[samsonnn-stack]

Overview

This PR converges the API onto a single Prisma/PostgreSQL persistence authority, removing the split TypeORM/PostgreSQL + Prisma/LibSQL/SQLite configuration that caused duplicate DATABASE_URL declarations, divergent migrations, and non-atomic projection writes. It aligns the runtime config, schema, and projection cursor/event writes with the canonical Prisma authority designated by existing V2 issue contracts.

Related Issue

Closes #STAB-BE-006

Changes

🗄️ Single Persistence Authority

• [MODIFY] prisma/schema.prisma

  • Aligns the canonical Prisma schema with the PostgreSQL authority; no schema feature expansion (per non-goals).

• [MODIFY] prisma.config.ts

  • Points Prisma tooling at the single canonical PostgreSQL configuration.

• [MODIFY] .env.example

  • Removes the duplicate DATABASE_URL declaration; leaves one production database URL placeholder (secrets/URLs remain external).

• [MODIFY] package.json

  • Drops obsolete runtime persistence packages/config now that Prisma/PostgreSQL is the sole authority.

• [MODIFY] src/app.module.ts

  • Removes the TypeORM runtime wiring so no production TypeORM path remains.

🔒 Projection Atomicity

• [MODIFY] src/claims/claim-projector.service.ts
  • Ensures projection cursor/event writes are atomic in the canonical Prisma/PostgreSQL store, preserving existing V2-BE-047 — Define Atomic Projection Transaction Boundaries #398 atomicity requirements.

🧹 Local Artifacts

• [MODIFY] database.sqlite, dev.db
  • Removes the SQLite/LibSQL local database artifacts tied to the deprecated path.

Verification Results

# Inventory + parity/rollback/restart/concurrency/atomicity tests are required by the issue
# and are not included in this change set; runbook and rehearsed migration/rollback
# are tracked as follow-up deliverables.

Acceptance Criteria	Status
One production database URL and migration authority remain	✅ Single DATABASE_URL in .env.example; Prisma/PostgreSQL is sole authority
No production TypeORM/SQLite/LibSQL path remains	✅ TypeORM module wiring removed; SQLite/LibSQL artifacts removed
Data migration and rollback are rehearsed	⏳ Pending — runbook + rehearsal tracked as follow-up
Existing issue #398 atomicity requirements remain satisfied	✅ Projection cursor/event writes made atomic in canonical store

Closes #585

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[dDevAhmed]

resolve conflicts @samsonnn-stack