[Copilot]

The Backend Tests GitHub Actions job was failing before test execution because app import initialized SQLAlchemy with the postgresql+psycopg dialect while psycopg was not installed. This change aligns runtime dependencies with the configured database driver.

• Root cause addressed

  • Added missing PostgreSQL driver package required by SQLAlchemy’s psycopg dialect.

• Dependency update

  • Updated requirements.txt to include psycopg v3 with binary wheels.

# requirements.txt
psycopg[binary]==3.2.12

• Impact
  • Removes ModuleNotFoundError: No module named 'psycopg' during backend test startup in CI.
  • Keeps existing DB URL/dialect configuration unchanged; only dependency alignment was required.