birdnet-go: guard SQLite revert to only run when HA MariaDB host matches

When mariadb_auto_config is disabled, only revert output.mysql.enabled to
false (and re-enable SQLite) if config.yaml's output.mysql.host matches the
HA MariaDB service host. This prevents clobbering a manually-configured
MySQL block pointing at a different server on every addon restart.

birdnet-go/CHANGELOG.md

@@ -1,6 +1,6 @@
 ## nightly-20260615-2 (2026-06-23)
 - MariaDB auto-config: create the `birdnet` database on first start if it does not exist (birdnet-go connects to a pre-existing schema and does not create it, causing "database doesn't exist" errors)
-- MariaDB auto-config: disabling `mariadb_auto_config` now writes `output.mysql.enabled = false` and `output.sqlite.enabled = true` back to config.yaml, so turning the option off fully reverts to SQLite
+- MariaDB auto-config: disabling `mariadb_auto_config` now reverts to SQLite only when `output.mysql.host` in config.yaml matches the HA MariaDB host (avoids clobbering manually-configured MySQL pointing at a different server)
 - Added `mariadb-client` to the addon packages so the `mysql` CLI used for database creation is available inside the container
 
  - MQTT auto-config now also enables BirdNET-Go's native Home Assistant MQTT auto-discovery: detection sensors appear in Home Assistant automatically with no manual YAML (existing UI/config.yaml edits are preserved)

birdnet-go/rootfs/etc/cont-init.d/33-mariadb.sh

@@ -41,12 +41,17 @@ if ! bashio::config.true 'mariadb_auto_config'; then
     bashio::log.blue "Port             : ${MYSQL_PORT}"
     bashio::log.green "---"
     if [ -f "$CONFIG_LOCATION" ]; then
-        # Revert any previously written mysql block so the app uses SQLite.
+        # Only revert if config.yaml points at the HA MariaDB host we would have
+        # written — a mysql block pointing at a different host was set manually.
         # shellcheck disable=SC2016
-        yq -i -y \
-            '.output.mysql.enabled = false
-             | .output.sqlite.enabled = true' \
-            "$CONFIG_LOCATION"
+        CURRENT_MYSQL_HOST="$(yq -r '.output.mysql.host // empty' "$CONFIG_LOCATION" 2>/dev/null || true)"
+        if yq -e '.output.mysql.enabled == true' "$CONFIG_LOCATION" >/dev/null 2>&1 \
+            && [ "${CURRENT_MYSQL_HOST}" = "${MYSQL_HOST}" ]; then
+            yq -i -y \
+                '.output.mysql.enabled = false
+                 | .output.sqlite.enabled = true' \
+                "$CONFIG_LOCATION"
+        fi
     fi
     exit 0
 fi