* feat(alerts): add Matrix alert provider
* fix(alerts): use PUT instead of POST for Matrix send-event endpoint
The Matrix Client-Server API requires PUT for
/_matrix/client/v3/rooms/{roomId}/send/{eventType}/{txnId}; sending
POST would be rejected by any spec-compliant homeserver (405), so
alerts would never actually send. Also documents that matrixroom
must be the internal room ID, not the human-readable room alias.
* fix: restore executable bit on alert_matrix.sh
* fix(alerts): register alert_matrix module and harden dispatch
Addresses review feedback on the Matrix alert provider:
- Register alert_matrix.sh in core_modules.sh so the module actually
resolves when alert.sh calls it (without this the call fails as an
unknown command and no alert is ever sent).
- Use curl -sSL to follow redirects, matching the other alert modules
(some homeservers/reverse proxies redirect the client API).
- Require matrixhomeserver to be set in the dispatch condition,
consistent with the TEST-ALERT checks, to avoid building a broken
URL when it is empty.
Daniel Gibbs
641048dedb