Fix #2720.

chore(deps): update dock.mau.dev/mautrix/signal docker tag to v0.6.0

chore(deps): update dock.mau.dev/mautrix/meta docker tag to v0.3.0

chore(deps): update dock.mau.dev/mautrix/gmessages docker tag to v0.4.0

chore(deps): update dock.mau.dev/mautrix/whatsapp docker tag to v0.10.7

exim-relay: fix dkim permissions, fix sender address

Resolve Synology DSM 7.2 Docker Command Issue

This also removes the condition that made it use `latest` when
self-building is enabled.

v0.1.4 is expected to build correctly now, given that this issue is fixed:
https://github.com/matrix-org/rust-synapse-compress-state/issues/134

chore(deps): update dependency prometheus to v2.51.2-0

chore(deps): update dependency grafana to v10.4.2-0

chore(deps): update matrixdotorg/sygnal docker tag to v0.14.1

chore(deps): update matrixdotorg/dendrite-monolith docker tag to v0.13.7

I believe this wiring had gotten lost at some point before.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3199

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3254

Meta messenger documentation clarification

* Add link to database migration documentation.
* Correct configuration snippet to dict instead of str

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3248

chore(deps): update ghcr.io/element-hq/synapse docker tag to v1.104.0

add matrix_synapse_redis_dbid var

This new version makes the mail spool persistent, so that exim can be
restarted without losing queued messages.

chore(deps): update dependency backup_borg to v1.2.8-1.8.9-0

Ref: 0e05a332db (commitcomment-140240527)