feat(p0): add favorite folder sync and sqlite data foundation

Implement P0 of the reaction dashboard: config loading with hot reload, SQLite migrations with backups, single-writer queue, read-only Bilibili fav client, folder import/diff sync, invalid-resource handling, blacklist seed, scheduler, and JSON redacted logging. Includes offline unit and transport-level contract tests; all existing and new tests pass.

reaction_board/bilibili/models.py

@@ -0,0 +1,87 @@
+# -*- coding: utf-8 -*-
+"""B 站收藏夹接口的返回模型。"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Any, Mapping
+
+
+@dataclass(frozen=True)
+class FavId:
+    """``fav/resource/ids`` 的一条资源。"""
+
+    aid: int
+    type: int
+    bvid: str | None = None
+
+
+@dataclass(frozen=True)
+class FavResource:
+    """``fav/resource/infos`` 的一条视频元数据。"""
+
+    aid: int
+    bvid: str | None
+    title: str
+    up_mid: int | None
+    up_name: str | None
+    pubdate: int
+    duration: int | None
+    cover: str | None
+    attr: int
+    fav_time: int | None
+
+    @property
+    def invalid(self) -> bool:
+        # 实测 attr=9 表示"已失效视频"。
+        return self.attr == 9
+
+    @classmethod
+    def from_api(cls, item: Mapping[str, Any]) -> "FavResource":
+        aid = item.get("id")
+        if isinstance(aid, bool) or not isinstance(aid, int):
+            raise ValueError("infos item.id 不是整数")
+        upper = item.get("upper") or {}
+        if not isinstance(upper, Mapping):
+            upper = {}
+        up_mid = upper.get("mid")
+        if isinstance(up_mid, bool) or not isinstance(up_mid, int):
+            up_mid = None
+        raw_duration = item.get("duration")
+        duration = raw_duration if isinstance(raw_duration, int) and not isinstance(
+            raw_duration, bool
+        ) else None
+        raw_attr = item.get("attr", 0)
+        attr = raw_attr if isinstance(raw_attr, int) and not isinstance(raw_attr, bool) else 0
+        fav_time = item.get("fav_time")
+        if isinstance(fav_time, bool) or not isinstance(fav_time, int) or fav_time <= 0:
+            fav_time = None
+        bvid = item.get("bvid") or item.get("bv_id")
+        if not isinstance(bvid, str) or not bvid:
+            bvid = None
+        return cls(
+            aid=aid,
+            bvid=bvid,
+            title=str(item.get("title") or ""),
+            up_mid=up_mid,
+            up_name=str(upper.get("name") or "") or None,
+            pubdate=int(item.get("pubtime") or item.get("ctime") or 0),
+            duration=duration,
+            cover=str(item.get("cover") or "") or None,
+            attr=attr,
+            fav_time=fav_time,
+        )
+
+
+@dataclass(frozen=True)
+class FolderInfo:
+    media_id: int
+    title: str
+    media_count: int
+
+
+@dataclass(frozen=True)
+class InfosResult:
+    requested: tuple[int, ...]
+    items: dict[int, FavResource]
+    missing: tuple[int, ...]