Polygres CLI 0.4.0

Added

• Added one-step polygres projects create sync <name> orchestration for source
  inspection, table selection, admission, and project provisioning without
  exposing internal attempt IDs.
• Sync source credentials are accepted only through named environment variables
  or hidden interactive prompts; mutations expose resumable idempotency keys.

Changed

• Synchronized PostgreSQL projects now reject database connection CLI surfaces
  with the stable SYNCED_PROJECT_SURFACE_UNAVAILABLE permission contract
  before any database client is started. Public readiness and vector commands
  remain available.