v0.82.0

Added

• synapse commands prints every subcommand grouped by its stability tier (stable core, adapters,
  read-only analysis, advisory governance, experimental) with a one-line summary of each tier, so the
  surface can be scanned by responsibility instead of read as one flat synapse --help list.

Fixed

• The federation gate now degrades to the local frame path when reading the peer's live certificate
  raises, instead of letting the exception crash the connection's frame handler. A certificate read can
  fail on a socket that has closed or never completed its TLS handshake; such a frame is now handled
  exactly as an absent certificate is.