migrations: handle incramental/queued scans more gracefully

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I13ef3c7b03f3833e90a7bfcdb03ac0136a6a6964

migrations/sqlite/V10__incremental_scan.sql

@@ -0,0 +1,19 @@
+-- Add file_mtime column to media_items table for incremental scanning
+-- Stores Unix timestamp in seconds of the file's modification time
+
+ALTER TABLE media_items ADD COLUMN file_mtime INTEGER;
+
+-- Create index for quick mtime lookups
+CREATE INDEX IF NOT EXISTS idx_media_items_file_mtime ON media_items(file_mtime);
+
+-- Create a scan_history table to track when each directory was last scanned
+CREATE TABLE IF NOT EXISTS scan_history (
+    id TEXT PRIMARY KEY,
+    directory TEXT NOT NULL UNIQUE,
+    last_scan_at TEXT NOT NULL,
+    files_scanned INTEGER NOT NULL DEFAULT 0,
+    files_changed INTEGER NOT NULL DEFAULT 0,
+    scan_duration_ms INTEGER
+);
+
+CREATE INDEX IF NOT EXISTS idx_scan_history_directory ON scan_history(directory);