feat(log): 解耦用户访问日志存储，支持切换日志主库

用户访问日志可在 ClickHouse、PostgreSQL、SQLite 之间切换。
关闭 ClickHouse 时由主库承接写入与查询；切换任务会冻结写入、复制数据后翻转主库。
启动时校验日志主库与运行配置一致，定期清理按各库保留天数删除过期记录。

internal/infra/persistence/migrator/goose/sqlite/202608160001_create_user_access_logs.sql

@@ -0,0 +1,22 @@
+-- +goose Up
+CREATE TABLE IF NOT EXISTS w_user_access_logs (
+    id          INTEGER NOT NULL,
+    user_id     INTEGER NOT NULL DEFAULT 0,
+    path        TEXT NOT NULL DEFAULT '',
+    method      TEXT NOT NULL DEFAULT '',
+    ip          TEXT NOT NULL DEFAULT '',
+    user_agent  TEXT NOT NULL DEFAULT '',
+    headers     TEXT NOT NULL DEFAULT '',
+    status      INTEGER NOT NULL DEFAULT 0,
+    latency     INTEGER NOT NULL DEFAULT 0,
+    created_at  DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (id, created_at)
+);
+
+CREATE INDEX IF NOT EXISTS idx_w_user_access_logs_user_id ON w_user_access_logs (user_id, created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_w_user_access_logs_created_at ON w_user_access_logs (created_at DESC);
+
+-- +goose Down
+DROP TABLE IF EXISTS w_user_access_logs;
+DROP INDEX IF EXISTS idx_w_user_access_logs_user_id;
+DROP INDEX IF EXISTS idx_w_user_access_logs_created_at;

internal/infra/persistence/migrator/goose/sqlite/202608160002_log_database_configs.sql

@@ -0,0 +1,17 @@
+-- +goose Up
+INSERT OR IGNORE INTO w_system_configs (key, value, type, visibility, description, created_at, updated_at)
+VALUES
+    ('log_database', '', 'system', 0, '当前日志主库（postgres/sqlite/clickhouse），由切换任务写入', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP),
+    ('log_db_migration', '', 'system', 0, '日志库迁移冻结标记（空或 migrating）', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP),
+    ('log_retention_days_postgres', '30', 'business', 0, 'PostgreSQL 用户访问日志保留天数', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP),
+    ('log_retention_days_sqlite', '30', 'business', 0, 'SQLite 用户访问日志保留天数', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP),
+    ('log_retention_days_clickhouse', '30', 'business', 0, 'ClickHouse 用户访问日志保留天数', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP);
+
+-- +goose Down
+DELETE FROM w_system_configs WHERE key IN (
+    'log_database',
+    'log_db_migration',
+    'log_retention_days_postgres',
+    'log_retention_days_sqlite',
+    'log_retention_days_clickhouse'
+);