feat: sync_channel_members configurable for telegram bridge

.env.sample

@@ -119,6 +119,7 @@ RETENTION_MAX_LIFETIME=4w
 #ENABLE_ENCRYPTION=true
 #TELEGRAM_APP_ID=
 #TELEGRAM_BRIDGE_PERMISSIONS="{ \"*\": \"relaybot\" }"
+#TELEGRAM_SYNC_CHANNEL_MEMBERS=true
 #SECRET_TELEGRAM_DB_PASSWORD_VERSION=v1
 #SECRET_TELEGRAM_API_HASH_VERSION=v1
 #SECRET_TELEGRAM_BOT_TOKEN_VERSION=v1

compose.telegram.yml

@@ -25,6 +25,7 @@ services:
       - HOMESERVER_URL
       - TELEGRAM_APP_ID
       - TELEGRAM_BRIDGE_PERMISSIONS
+      - TELEGRAM_SYNC_CHANNEL_MEMBERS
       - VERIFY_SSL
     secrets:
       - telegram_api_hash

telegram_bridge.yaml.tmpl

@@ -151,7 +151,7 @@ bridge:
     # Whether or not to sync the member list in channels.
     # If no channel admins have logged into the bridge, the bridge won't be able to sync the member
     # list regardless of this setting.
-    sync_channel_members: true
+    sync_channel_members: {{ env "TELEGRAM_SYNC_CHANNEL_MEMBERS" }}
     # Whether or not to skip deleted members when syncing members.
     skip_deleted_members: true
     # Whether or not to automatically synchronize contacts and chats of Matrix users logged into