v0.16.7-beta.1

Beta prerelease — to be tested by the reporter before promotion to stable.

Fixed

• FCM listener no longer dies in a reconnect loop on an undecryptable push (#25) — follow-up to the #21 padding fix. A malformed crypto-key (dh=) value that decodes to an invalid P-256 point made http_ece raise ValueError: Invalid EC key, which propagated to the upstream _listen catch-all and shut the client down. Because the crash happened before the message was acknowledged, MCS redelivered the same poisoned message on every reconnect — an endless crash/restart loop with no notifications. The per-message decrypt is now isolated: any decode/decrypt failure is logged and that single message is skipped so the listener acks it and stays alive to process the next push.