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/cmd/root.go

@@ -40,6 +40,7 @@ var rootCmd = &cobra.Command{
 	},
 	PreRun: func(_ *cobra.Command, _ []string) {
 		migrator.Migrate()
+		migrator.MigrateClickHouse()
 	},
 	PersistentPostRun: func(_ *cobra.Command, _ []string) {
 		shutdownTraceProvider()