* fix: fail fast when ChromaDB is unreachable instead of blocking startup
* fix: only cache the ChromaDB client after a successful heartbeat
* test: cover ChromaDB fast-fail preflight and no-cache-on-failure
* fix: populate window._myEmailAddress from the active email account
* fix: keep Cc recipients in reply-all when own address is empty or unknown
* test: cover reply-all recipient building (issue #360)
* fix: coerce null endpoint_url when delivering task result to a session
* fix: also coerce null model so the session insert satisfies NOT NULL
* test: cover task session delivery on an empty database
Afonso Coutinho