Expand description
Postgres-side thin wrapper over ff_core::handle_codec.
RFC-v0.7 Wave 1c scaffold. Mirrors
ff_backend_valkey::handle_codec so the Postgres trait impls
(Waves 4+) have a symmetric encode/decode path and so the
workspace has compile-time evidence that the core codec is
backend-agnostic.
At Wave 1c the Postgres backend still returns Unavailable for
every trait method that touches a Handle, so the bodies here
are unused by the live hot path today — they exist to lock in the
backend-tag invariant (a Postgres backend never accepts a
Valkey-tagged handle) and to give Wave 4 a ready-to-use API.