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/backend.py

@@ -0,0 +1,35 @@
+"""数据库后端选择：配置了 MYSQL_DSN 时走 MySQL，否则回退本地 SQLite。"""
+
+from __future__ import annotations
+
+from typing import Literal
+from urllib.parse import unquote, urlparse
+
+from jiangchang_skill_core import config
+
+DbBackend = Literal["sqlite", "mysql"]
+
+
+def get_mysql_dsn() -> str:
+    return (config.get("MYSQL_DSN") or "").strip()
+
+
+def resolve_backend() -> DbBackend:
+    return "mysql" if get_mysql_dsn() else "sqlite"
+
+
+def parse_mysql_dsn(dsn: str) -> dict[str, object]:
+    text = dsn.strip()
+    if not text.startswith(("mysql://", "mysql2://")):
+        raise ValueError("MYSQL_DSN must be a mysql:// URL.")
+    parsed = urlparse(text)
+    database = (parsed.path or "").lstrip("/")
+    if not database:
+        raise ValueError("MYSQL_DSN must include a database name.")
+    return {
+        "host": parsed.hostname or "127.0.0.1",
+        "port": parsed.port or 3306,
+        "user": unquote(parsed.username or ""),
+        "password": unquote(parsed.password or ""),
+        "database": database,
+    }