fix: close data integrity and hot-reload review findings

Backfill same-day snapshots for newly added or restored videos, preserve successful fan snapshots on resume, persist incomplete state before forced re-runs, and split collection completion from backup completion so failed backups can retry without API calls. Reject missing data payloads instead of treating them as empty folders, guard against mass-unfav on suspicious empty remote folders, rebuild Bilibili clients when credentials change, recompute primary folder ownership from active relations with per-folder fav_time, preserve original titles for dropped invalid videos, poll config every 60 seconds, and fix favsort verify interval and mixed resource types.

tests/test_migrations.py

@@ -37,14 +37,18 @@ def test_fresh_and_idempotent():
         conn = sqlite3.connect(Path(tmp) / "app.db")
         try:
             applied = run_migrations(conn)
-            assert applied == [1]
-            assert current_version(conn) == 1
+            assert applied == [1, 2]
+            assert current_version(conn) == 2
             assert EXPECTED_TABLES <= table_names(conn)
             assert "schema_version" in table_names(conn)
+            columns = {
+                row[1] for row in conn.execute("PRAGMA table_info(folder_resource)")
+            }
+            assert "fav_time" in columns
             # 再跑一次不应重复应用
             assert run_migrations(conn) == []
             row = conn.execute("SELECT COUNT(*) FROM schema_version").fetchone()
-            assert row[0] == 1
+            assert row[0] == 2
         finally:
             conn.close()
 
@@ -59,15 +63,15 @@ def test_backup_before_upgrade():
             conn.execute("INSERT INTO kv(k, v) VALUES ('hello', 'world')")
             conn.commit()
 
-            v2 = Migration(2, "add probe", ("CREATE TABLE probe (id INTEGER PRIMARY KEY)",))
+            v3 = Migration(3, "add probe", ("CREATE TABLE probe (id INTEGER PRIMARY KEY)",))
             applied = run_migrations(
                 conn,
                 backup_dir=backup_dir,
                 now=1_800_000_000,
-                migrations=MIGRATIONS + (v2,),
+                migrations=MIGRATIONS + (v3,),
             )
-            assert applied == [2]
-            backups = list(backup_dir.glob("app-pre-v1-*.db"))
+            assert applied == [3]
+            backups = list(backup_dir.glob("app-pre-v2-*.db"))
             assert len(backups) == 1
             check = sqlite3.connect(backups[0])
             try: