chore: upgrade synapse to v1.160.0, MAS to 1.24.0, mautrix-telegram to v0.2608.0, mautrix-signal to v0.2608.0, nginx to 1.31.5; hold bridge DBs at postgres:13-alpine

compose.discord.yml

@@ -30,7 +30,7 @@ services:
       - internal
 
   discorddb:
-    image: postgres:16-alpine
+    image: postgres:13-alpine
     secrets:
       - discord_db_password
     environment:

compose.signal.yml

@@ -10,7 +10,7 @@ services:
       - signal-data:/signal-data
 
   signalbridge:
-    image: dock.mau.dev/mautrix/signal:v26.02.2
+    image: dock.mau.dev/mautrix/signal:v0.2608.0
     depends_on:
       - signaldb
     configs:
@@ -35,7 +35,7 @@ services:
       - internal
 
   signaldb:
-    image: postgres:16-alpine
+    image: postgres:13-alpine
     secrets:
       - signal_db_password
     environment:

compose.telegram.yml

@@ -40,7 +40,7 @@ services:
       - internal
 
   telegramdb:
-    image: postgres:16-alpine
+    image: postgres:13-alpine
     secrets:
       - telegram_db_password
     environment: