fix: scan populates each followed artist's full discography (unmonitored)

A followed artist previously showed only the one owned album ("of 1")
because scan_library recorded just the resolved release. Now scan
browses each artist's full MusicBrainz release-group list once per
run and stores it as unmonitored MonitoredRelease rows, matching
web-follow behavior. The owned album keeps its monitored/fulfilled
state via ON CONFLICT DO NOTHING.

worker/lyra_worker/main.py

@@ -25,8 +25,8 @@ def _set_config(conn, key: str, value: str) -> None:
     conn.commit()
 
 
-def _run_scan(conn, resolver, probe, dest_root: str = DEST_ROOT) -> None:
-    result = scan_library(conn, resolver, probe, dest_root)
+def _run_scan(conn, resolver, probe, browser, dest_root: str = DEST_ROOT) -> None:
+    result = scan_library(conn, resolver, probe, browser, dest_root)
     _set_config(conn, "scan.result", f"imported {result.imported}, skipped {result.skipped}")
     _set_config(conn, "scan.requested", "false")
     print(f"worker: library scan done — {result.imported} imported, {result.skipped} skipped", flush=True)
@@ -58,7 +58,7 @@ def run_forever() -> None:
 
             if str(config.get("scan.requested", "")).strip().lower() in _TRUE:
                 try:
-                    _run_scan(conn, resolver, probe)
+                    _run_scan(conn, resolver, probe, browser)
                 except Exception as e:  # a scan error must never kill the worker
                     print(f"worker: library scan failed: {e}", flush=True)
                     conn.rollback()