feat: Minstrel no longer talks to Lidarr: its connection, Delete via Lidarr and the unmonitor options are gone, and the track reports are plain quarantine (M502 #5525)

Migration 0091 drops lidarr_config and renames the quarantine tables, types,
indexes and the history column off the Lidarr name. The Integrations Lidarr
card, the Reports "Delete via Lidarr" action, the merge and remove-track
unmonitor options, the Lidarr audit actions and error codes go, on the
server, web and Android. The README describes acquisition as it is now.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/server/server_test.go

@@ -155,7 +155,7 @@ func TestRouter_RestPathNotSwallowedBySPA(t *testing.T) {
 // in server.go was creating a second chi subtree at the same prefix as the
 // nested admin Route inside api.Mount. chi.Walk shows both subtrees as
 // registered, but runtime routing dispatch only matches one — every admin
-// endpoint registered by api.Mount (Lidarr config, quarantine, etc.)
+// endpoint registered by api.Mount (summary, quarantine, etc.)
 // silently 404'd for authenticated callers in production.
 //
 // chi.Walk enumeration would NOT have caught this (both branches are in
@@ -212,7 +212,7 @@ func TestRouter_AdminSubtreeNotShadowed(t *testing.T) {
 	ts := httptest.NewServer(s.Router())
 	defer ts.Close()
 
-	// Each path is registered by a different package: lidarr/config from
+	// Each path is registered by a different package: admin/summary from
 	// api.Mount and admin/scan from server.Router. If chi runtime dispatch
 	// only routes one /api/admin subtree, one of these returns 404 — that
 	// IS the bug we shipped in 06a1fe1.
@@ -221,9 +221,9 @@ func TestRouter_AdminSubtreeNotShadowed(t *testing.T) {
 		path   string
 		owner  string
 	}{
-		{http.MethodGet, "/api/admin/lidarr/config", "api.Mount"},
+		{http.MethodGet, "/api/admin/summary", "api.Mount"},
 		// /api/admin/scan would actually trigger a real library scan via
-		// stubScanner; we don't include it. The lidarr/config path is the
+		// stubScanner; we don't include it. The admin/summary path is the
 		// canonical regression check.
 	}
 	for _, tc := range cases {