feat: add software_hashes table schema and reimport pipeline

- Add softwareHashes Drizzle model (download_id PK, md5, crc32,
  size_bytes, inner_path, updated_at)
- Update import_mysql.sh to reimport from JSON snapshot after DB wipe
- Add pnpm scripts: update:hashes, export:hashes
- Create data/zxdb/ directory for JSON snapshot storage

claude-opus-4-6@MacFiver

bin/import_mysql.sh

@@ -37,4 +37,49 @@ mysql $MYSQL_ARGS < ZXDB/ZXDB_mysql.sql
 #  echo "CREATE ROLE IF NOT EXISTS 'zxdb_readonly';"
 #  echo "GRANT SELECT, SHOW VIEW ON \`zxdb\`.* TO 'zxdb_readonly';"
 } | mysql --force $MYSQL_ARGS "$DB_NAME"
+# ---- Reimport software_hashes from JSON snapshot if available ----
+HASHES_SNAPSHOT="$SCRIPT_DIR/../data/zxdb/software_hashes.json"
+if [ -f "$HASHES_SNAPSHOT" ]; then
+  echo "Reimporting software_hashes from $HASHES_SNAPSHOT ..."
+  node -e "
+    const fs = require('fs');
+    const mysql = require('mysql2/promise');
+    (async () => {
+      const snap = JSON.parse(fs.readFileSync('$HASHES_SNAPSHOT', 'utf8'));
+      if (!snap.rows || snap.rows.length === 0) {
+        console.log('  No rows in snapshot, skipping.');
+        return;
+      }
+      const pool = mysql.createPool({ uri: '$ZXDB_URL', connectionLimit: 1 });
+      await pool.query(\`
+        CREATE TABLE IF NOT EXISTS software_hashes (
+          download_id INT NOT NULL PRIMARY KEY,
+          md5 VARCHAR(32) NOT NULL,
+          crc32 VARCHAR(8) NOT NULL,
+          size_bytes BIGINT NOT NULL,
+          inner_path VARCHAR(500) NOT NULL,
+          updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+          INDEX idx_sh_md5 (md5),
+          INDEX idx_sh_crc32 (crc32)
+        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
+      \`);
+      await pool.query('TRUNCATE TABLE software_hashes');
+      // Batch insert in chunks of 500
+      const chunk = 500;
+      for (let i = 0; i < snap.rows.length; i += chunk) {
+        const batch = snap.rows.slice(i, i + chunk);
+        const values = batch.map(r => [r.download_id, r.md5, r.crc32, r.size_bytes, r.inner_path, r.updated_at]);
+        await pool.query(
+          'INSERT INTO software_hashes (download_id, md5, crc32, size_bytes, inner_path, updated_at) VALUES ?',
+          [values]
+        );
+      }
+      console.log('  Imported ' + snap.rows.length + ' rows into software_hashes.');
+      await pool.end();
+    })().catch(e => { console.error('  Error reimporting software_hashes:', e.message); process.exit(0); });
+  "
+else
+  echo "No software_hashes snapshot found at $HASHES_SNAPSHOT — skipping reimport."
+fi
+
 mysqldump --no-data -uroot -p -h${DB_HOST} -P${DB_PORT} "$DB_NAME" > ZXDB/ZXDB_mysql_STRUCTURE_ONLY.sql