B-42: 导入功能加固——逐工作表确认、流式上传与诊断证据

src/bank_importer/db.py

@@ -307,6 +307,53 @@ MIGRATIONS: tuple[Migration, ...] = (
         ALTER TABLE bank_accounts_new RENAME TO bank_accounts;
         """,
     ),
+    Migration(
+        version=4,
+        name="0004_per_sheet_reviews",
+        # Per-worksheet lifecycle: the parse outcome (parsed/exception/ignored)
+        # is immutable evidence captured at import time; the human decision
+        # (pending/confirmed/ignored) is the audit-gated gate that lets a
+        # worksheet participate in later matching and calculation.
+        up="""
+        CREATE TABLE sheet_reviews (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            import_batch_id INTEGER NOT NULL REFERENCES import_batches (id),
+            sheet_name TEXT NOT NULL,
+            outcome TEXT NOT NULL
+                CHECK (outcome IN ('parsed', 'exception', 'ignored')),
+            message TEXT,
+            scanned_rows INTEGER,
+            candidate_headers TEXT,
+            sheet_batch_id INTEGER REFERENCES sheet_batches (id),
+            review_status TEXT NOT NULL DEFAULT 'pending'
+                CHECK (review_status IN ('pending', 'confirmed', 'ignored')),
+            review_reason TEXT,
+            reviewed_by INTEGER REFERENCES users (id),
+            reviewed_at TEXT,
+            created_at TEXT NOT NULL,
+            UNIQUE (import_batch_id, sheet_name)
+        );
+
+        CREATE INDEX idx_sheet_reviews_batch ON sheet_reviews (import_batch_id);
+
+        CREATE TRIGGER sheet_reviews_evidence_immutable BEFORE UPDATE ON sheet_reviews
+        BEGIN
+            SELECT RAISE (ABORT, 'sheet_reviews parse evidence is immutable')
+            WHERE OLD.outcome != NEW.outcome
+               OR OLD.message IS NOT NEW.message
+               OR OLD.scanned_rows IS NOT NEW.scanned_rows
+               OR OLD.candidate_headers IS NOT NEW.candidate_headers
+               OR OLD.sheet_batch_id IS NOT NEW.sheet_batch_id
+               OR OLD.import_batch_id IS NOT NEW.import_batch_id
+               OR OLD.sheet_name IS NOT NEW.sheet_name;
+        END;
+        """,
+        down="""
+        DROP TRIGGER IF EXISTS sheet_reviews_evidence_immutable;
+        DROP INDEX IF EXISTS idx_sheet_reviews_batch;
+        DROP TABLE IF EXISTS sheet_reviews;
+        """,
+    ),
 )
 
 
@@ -314,7 +361,9 @@ def connect(path: str | Path) -> sqlite3.Connection:
     db_path = Path(path)
     if str(db_path) != ":memory:":
         db_path.parent.mkdir(parents=True, exist_ok=True)
-    connection = sqlite3.connect(str(db_path))
+    # Long busy timeout so concurrent uploads/confirmations wait for the
+    # single SQLite writer instead of surfacing "database is locked" 500s.
+    connection = sqlite3.connect(str(db_path), timeout=30)
     connection.row_factory = sqlite3.Row
     connection.execute("PRAGMA foreign_keys = ON")
     return connection