fix(deploy): disable readOnlyRootFilesystem to prevent temp file write errors

Email worker and other pods fail with "Read-only file system" when
readOnlyRootFilesystem is true, since they need to write temp files.
Also adds debug print statements for database connection lifecycle.

deploy/values.yaml

@@ -200,7 +200,7 @@ securityContext:
   capabilities:
     drop:
       - ALL
-  readOnlyRootFilesystem: true
+  readOnlyRootFilesystem: false
 
 nodeSelector: {}
 tolerations: []

libs/db/database.rs

@@ -22,7 +22,7 @@ impl AppDatabase {
         let connection_timeout = cfg.database_connection_timeout()?;
         let schema_search_path = cfg.database_schema_search_path()?;
         let read_replica = cfg.database_read_replicas()?;
-
+        println!("[System]: Start Connect Database");
         let conn_cfg = sea_orm::ConnectOptions::new(db_url)
             .max_connections(max_connections)
             .min_connections(min_connections)
@@ -34,7 +34,7 @@ impl AppDatabase {
             .to_owned();
 
         let db_write = Database::connect(conn_cfg).await?;
-
+        println!("[System]: Start Read Database");
         let db_read = if let Some(ref replica_url) = read_replica {
             let conn_cfg = sea_orm::ConnectOptions::new(replica_url.clone())
                 .max_connections(max_connections)