feat(log): decouple log storage from ClickHouse with switchable logstore

- New internal/repository/logstore abstraction: exported domain interfaces
  (AccessLogStore/ObservabilityStore/UserAccessLogStore/StatusStore),
  config-driven provider (Active/Build/Migrating/SetConfigReader), GORM
  implementation for PostgreSQL/SQLite (incl. hourly rollups computed in
  real time, migration listers, PG partition maintenance), and a ClickHouse
  wrapper preserving the native batch path; repository facade delegates to
  logstore; import-lint test enforces apps never import analyticsrepo.
- ClickHouse is now optional: the log DB is either the main DB (postgres
  when database.enabled, else sqlite) or clickhouse; boot validation +
  first-run seed; log_database / log_db_migration are protected keys.
- New user task 切换日志数据库 (of_log_db_switch): freeze log writes,
  drain batch writers, copy all 6 raw log tables by id (preserving IDs)
  with target-partition pre-creation for PG, flip log_database on success,
  clear the freeze flag on failure.
- Per-store retention (log_retention_days_*) with expiry cleanup folded
  into the daily system_cleanup task; legacy database_auto_cleanup_* and
  of_database_auto_cleanup decommissioned.
- goose migrations: 6 log tables in PG (2 monthly-partitioned) + SQLite,
  retention config seeds, schedule cleanup; GET
  /api/v1/admin/status/log-database endpoint; frontend retention settings,
  switch-task UI and status badge; changelog and docs updated.

docs(plan): log database decoupling implementation plan

docs(design): log database decoupling design (ClickHouse optional)

internal/testhelper/test_helper.go

@@ -11,11 +11,14 @@ import (
 
 	db "github.com/Rain-kl/Wavelet/internal/infra/persistence"
 	"github.com/Rain-kl/Wavelet/internal/model"
+	analyticsmodel "github.com/Rain-kl/Wavelet/internal/model/analytics"
 	"github.com/Rain-kl/Wavelet/internal/repository"
+	"github.com/Rain-kl/Wavelet/internal/repository/logstore"
 	"github.com/alicebob/miniredis/v2"
 	"github.com/glebarez/sqlite"
 	"github.com/redis/go-redis/v9"
 	"github.com/redis/go-redis/v9/maintnotifications"
+	"github.com/stretchr/testify/require"
 	"gorm.io/gorm"
 )
 
@@ -307,6 +310,24 @@ func getSeedConfigsPart2() []model.SystemConfig {
 			Type:        configTypeBusiness,
 			Description: "Pages 每个项目最大历史部署保留数（0 表示不限制）",
 		},
+		{
+			Key:         model.ConfigKeyLogRetentionDaysPostgres,
+			Value:       "90",
+			Type:        configTypeBusiness,
+			Description: "PostgreSQL 日志保留天数（访问日志与可观测统一）",
+		},
+		{
+			Key:         model.ConfigKeyLogRetentionDaysSQLite,
+			Value:       "90",
+			Type:        configTypeBusiness,
+			Description: "SQLite 日志保留天数",
+		},
+		{
+			Key:         model.ConfigKeyLogRetentionDaysClickHouse,
+			Value:       "90",
+			Type:        configTypeBusiness,
+			Description: "ClickHouse 日志保留天数",
+		},
 	}
 }
 
@@ -352,3 +373,55 @@ func seedDefaultConfigs(t *testing.T, tx *gorm.DB) {
 		_ = db.HSetJSON(context.Background(), repository.SystemConfigRedisHashKey, config.Key, &config)
 	}
 }
+
+// SetupLogStoresForTest 将 logstore 指向测试已通过 db.SetDB 注入的 sqlite 库，
+// 并注册立即 flush 的 hooks，使 repository 层日志写入对后续读取立即可见。
+// 调用方必须先 db.SetDB(sqliteDB)（并迁移业务表），本函数负责迁移日志分析表。
+func SetupLogStoresForTest(t *testing.T) {
+	t.Helper()
+
+	gdb := db.DB(context.Background())
+	require.NoError(t, gdb.AutoMigrate(
+		&analyticsmodel.NodeAccessLog{},
+		&analyticsmodel.NodeMetricSnapshot{},
+		&analyticsmodel.NodeEdgeHealth{},
+		&analyticsmodel.NodeObsFrps{},
+		&analyticsmodel.NodeObsFrpc{},
+	))
+
+	logstore.ResetForTest()
+	logstore.SetConfigReader(func(_ context.Context, key string) (string, error) {
+		if key == model.ConfigKeyLogDatabase {
+			return "sqlite", nil
+		}
+		return "", nil
+	})
+	store, err := logstore.Active(context.Background())
+	require.NoError(t, err)
+
+	logstore.SetAccessLogHooks(logstore.AccessLogHooks{
+		QueueNodeAccessLogs: func(logs []analyticsmodel.NodeAccessLog) {
+			_ = store.AccessLogs.BatchInsertNodeAccessLogs(context.Background(), logs)
+		},
+	})
+	logstore.SetObservabilityHooks(logstore.ObservabilityHooks{
+		QueueMetricSnapshot: func(record analyticsmodel.NodeMetricSnapshot) {
+			_ = store.Observability.BatchInsertNodeMetricSnapshots(context.Background(), []analyticsmodel.NodeMetricSnapshot{record})
+		},
+		QueueEdgeHealth: func(record analyticsmodel.NodeEdgeHealth) {
+			_ = store.Observability.BatchInsertNodeEdgeHealth(context.Background(), []analyticsmodel.NodeEdgeHealth{record})
+		},
+		QueueNodeObsFrps: func(record analyticsmodel.NodeObsFrps) {
+			_ = store.Observability.BatchInsertNodeObsFrps(context.Background(), []analyticsmodel.NodeObsFrps{record})
+		},
+		QueueNodeObsFrpc: func(record analyticsmodel.NodeObsFrpc) {
+			_ = store.Observability.BatchInsertNodeObsFrpc(context.Background(), []analyticsmodel.NodeObsFrpc{record})
+		},
+	})
+
+	t.Cleanup(func() {
+		logstore.SetAccessLogHooks(logstore.AccessLogHooks{})
+		logstore.SetObservabilityHooks(logstore.ObservabilityHooks{})
+		logstore.ResetForTest()
+	})
+}