Refactor database schema: Remove access list and related entities, add editing session and edit operation entities

- Deleted `access_list_entry`, `location`, `proxy_host`, `proxy_host_access_list`, `session`, `stream_service`, `stream_service_access_list` entities and their corresponding migration files.
- Introduced `editing_session` and `edit_operation` entities with appropriate fields and relationships.
- Updated `mod.rs` and `prelude.rs` to reflect the changes in the entity structure.
- Adjusted migration files to remove obsolete migrations and include new migrations for the editing session and edit operation tables.

public/migration/src/lib.rs

@@ -15,13 +15,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20251011_000003_create_user_identity_table::Migration),
             Box::new(m20251223_000004_create_upstream_table::Migration),
             Box::new(m20251223_000005_create_upstream_target_table::Migration),
-            Box::new(m20251223_000006_create_proxy_host_table::Migration),
-            Box::new(m20251223_000007_create_location_table::Migration),
-            Box::new(m20251223_000008_create_stream_service_table::Migration),
-            Box::new(m20251223_000009_create_access_list_table::Migration),
-            Box::new(m20251223_000010_create_access_list_entry_table::Migration),
-            Box::new(m20251223_000011_create_proxy_host_access_list_table::Migration),
-            Box::new(m20251223_000012_create_stream_service_access_list_table::Migration),
+            Box::new(m20251230_000006_create_editing_session_table::Migration),
         ]
     }
 }