Pin logging stack images; fix Loki common.instance_addr placement

:latest images (loki 3.7.3/go1.26.4, presumably grafana/alloy too) reset
every TCP connection on this host — kernel is 5.16.7 (Fedora 35, EOL
since 2023), too old for whatever the newer Go toolchains need.
Confirmed via a disposable grafana/loki:2.9.8 test container: same
config, same host, works cleanly. Pin all three images to older stable
releases instead of chasing this again on every redeploy.

Also fixes an unrelated config bug: instance_addr belongs directly
under `common:`, not nested under `common.ring:` — the misplaced field
was silently ignored, which didn't help but wasn't the actual cause.

logging/loki-config.yaml

@@ -1,11 +1,14 @@
 auth_enabled: false
 
 server:
+  http_listen_address: 0.0.0.0
   http_listen_port: 3100
+  grpc_listen_address: 0.0.0.0
   grpc_listen_port: 9096
   log_level: info
 
 common:
+  instance_addr: 127.0.0.1
   path_prefix: /loki
   storage:
     filesystem:
@@ -13,7 +16,6 @@ common:
       rules_directory: /loki/rules
   replication_factor: 1
   ring:
-    instance_addr: 127.0.0.1
     kvstore:
       store: inmemory