feat(service): expand service layer with new domain operations

- Add IM service modules: audit, channel roles, custom emojis, forum
  tags, integrations, invitations, repo links, slash commands, stages,
  voice, webhooks
- Add PR service modules: review requests, templates
- Add repo service modules: contributors, release assets, git extras
  (archive, branch rename, commit extras, diff/merge, tag, tree)
- Add user service: social (follow/block)
- Add internal auth service
- Update existing service modules with expanded functionality
- Remove deleted IM modules: articles, delivery trace, drafts,
  follows, messages, polls, presence, reactions, threads

service/context.rs

@@ -10,6 +10,7 @@ use crate::etcd::EtcdRegistry;
 use crate::models::db::AppDatabase;
 use crate::queue::NatsQueue;
 use crate::service::im::events::ImEventBus;
+use crate::service::util::set_local_user_id;
 use crate::storage::s3::AppS3Storage;
 
 /// Shared infrastructure context for all domain services.
@@ -50,8 +51,7 @@ impl ServiceContext {
             .await
             .map_err(|_| AppError::TxnError)?;
 
-        sqlx::query("SET LOCAL app.current_user_id = $1")
-            .bind(user_uid)
+        sqlx::query(set_local_user_id(user_uid))
             .execute(&mut *txn)
             .await
             .map_err(AppError::Database)?;