release: v1.0.117 沉淀多数据源契约（SQLite 默认 + 可选 MySQL 云库）

新增 DATA_SOURCES.md、data-sources 示例与双后端 connection 骨架；CLI 与宿主 UI 可读写同一库。要求匠厂 Host ≥ 6.9.28。

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/db/connection.py

@@ -1,18 +1,38 @@
-"""SQLite 连接与幂等初始化模板。
+"""SQLite / MySQL 连接与幂等初始化模板。
 
 模板默认只建数据管理元数据表。业务表由复制后的技能自行 CREATE，并同步展示元数据。
+配置了 MYSQL_DSN 时走 MySQL 云库，否则使用本地 {skill_slug}.db。见 references/DATA_SOURCES.md。
 """
 
 from __future__ import annotations
 
 import sqlite3
 
+from db.backend import get_mysql_dsn, parse_mysql_dsn, resolve_backend
+from db.cursor_compat import AdaptedConnection
 from db.display_metadata import init_display_metadata
 from util.runtime_paths import get_db_path
 
 
-def get_conn() -> sqlite3.Connection:
-    return sqlite3.connect(get_db_path())
+def get_conn() -> AdaptedConnection:
+    backend = resolve_backend()
+    if backend == "mysql":
+        import pymysql
+
+        params = parse_mysql_dsn(get_mysql_dsn())
+        raw = pymysql.connect(
+            host=str(params["host"]),
+            port=int(params["port"]),
+            user=str(params["user"]),
+            password=str(params["password"]),
+            database=str(params["database"]),
+            charset="utf8mb4",
+            autocommit=False,
+        )
+        return AdaptedConnection(raw, "mysql")
+
+    raw = sqlite3.connect(get_db_path())
+    return AdaptedConnection(raw, "sqlite")
 
 
 def init_db() -> None:
@@ -23,3 +43,18 @@ def init_db() -> None:
         conn.commit()
     finally:
         conn.close()
+
+
+def describe_active_store() -> dict[str, str]:
+    backend = resolve_backend()
+    if backend == "mysql":
+        params = parse_mysql_dsn(get_mysql_dsn())
+        return {
+            "backend": "mysql",
+            "host": str(params["host"]),
+            "database": str(params["database"]),
+        }
+    return {
+        "backend": "sqlite",
+        "db_path": get_db_path(),
+    }