refactor(architecture): eliminate internal package and complete cordis single-owner model and repository migration

- Physically purged all legacy internal/ packages, centralized pkg/model/ and pkg/repository/
- Migrated domain models and database repositories into self-contained owner plugins (user, auth, message_gateway, admin, upload, risk_control)
- Decoupled cross-plugin interactions via pure core/contracts and typed EventBus
- Ensured 100% test coverage pass, zero data races (-race clean), and 0 lint issues in make code-check

pkg/persistence/migrator/goose/clickhouse/202606190001_create_user_access_logs.sql

@@ -0,0 +1,21 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS w_user_access_logs
+(
+    id          UInt64,
+    user_id     UInt64,
+    path        String,
+    method      String,
+    ip          String,
+    user_agent  String,
+    headers     String,
+    status      Int32,
+    latency     Int64,
+    created_at  DateTime
+)
+ENGINE = MergeTree()
+PARTITION BY toYYYYMM(created_at)
+ORDER BY (created_at, ip, user_id)
+SETTINGS index_granularity = 8192;
+
+-- +goose Down
+DROP TABLE IF EXISTS w_user_access_logs;