feat(clickhouse): integrate goose migrations and analytics repository

Add a separate ClickHouse OLAP pipeline with goose/clickhouse DDL as the
sole schema source, model/analytics for ORM mapping, and repository/analytics
for reads (ChDB/GORM) and batch writes (ChConn). Refactor risk_control and
admin/logs to use the repository layer instead of inline SQL. Remove the
manual support-files DDL and document the workflow in database-migration skill.

internal/db/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;