feat: bootstrap NAS music deduper

am_deduper/db.py

@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+import sqlite3
+from pathlib import Path
+
+SCHEMA = """
+CREATE TABLE IF NOT EXISTS audio_tracks (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    file_path TEXT UNIQUE NOT NULL,
+    file_size INTEGER NOT NULL,
+    fast_hash TEXT NOT NULL,
+    sha256 TEXT,
+    duration REAL,
+    artist TEXT,
+    title TEXT,
+    album TEXT,
+    format TEXT,
+    bitrate INTEGER,
+    sample_rate INTEGER,
+    bit_depth INTEGER,
+    chromaprint TEXT,
+    score INTEGER,
+    status TEXT NOT NULL DEFAULT 'active',
+    inode INTEGER,
+    device INTEGER,
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    trashed_at TEXT,
+    review_status TEXT
+);
+CREATE INDEX IF NOT EXISTS idx_fast_hash ON audio_tracks(fast_hash);
+CREATE INDEX IF NOT EXISTS idx_sha256 ON audio_tracks(sha256);
+CREATE INDEX IF NOT EXISTS idx_duration ON audio_tracks(duration);
+CREATE INDEX IF NOT EXISTS idx_status ON audio_tracks(status);
+"""
+
+
+def connect(path: Path) -> sqlite3.Connection:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    conn = sqlite3.connect(path)
+    conn.row_factory = sqlite3.Row
+    conn.execute("PRAGMA journal_mode=WAL")
+    conn.execute("PRAGMA foreign_keys=ON")
+    conn.executescript(SCHEMA)
+    return conn