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>

docs/screenshots/README.md

@@ -11,7 +11,7 @@ across all shots for a consistent look.
 | `home.png` | `/` | The home page with a populated library (system playlists / recently added) |
 | `register.png` | `/register` | The account-creation form on a fresh instance |
 | `library-scan.png` | `/admin` | The library scan running in stages (grab it mid-scan so stage tallies show) |
-| `integrations.png` | `/admin/acquisition` | Indexers, download clients, searching and Lidarr |
+| `integrations.png` | `/admin/acquisition` | Indexers, download clients and searching |
 | `android-download.png` | `/settings` | The "Install the Android app" download card |
 | `invite-users.png` | `/admin/users` | The invite-token generation / users list |
 

docs/smart-music-client-spec.md

@@ -1,5 +1,7 @@
 # Project Spec: Smart Music Client (companion app)
 
+> **History.** This is the original design spec, kept as written. Where it describes an outside library manager doing search, adds and deletes, Minstrel now does that itself (M502).
+
 ## 1. Overview
 
 A mobile music player client built as the intentional companion to the Smart Music Server (see `smart-music-server-spec.md`). This is not a general-purpose Subsonic client — it is the client that knows how to consume the server's extended API and surface its novel features (contextual likes, session-aware radio, Lidarr integration, server-canonical state) as first-class UX.

docs/smart-music-server-spec.md

@@ -1,5 +1,7 @@
 # Project Spec: Smart Music Server (working name)
 
+> **History.** This is the original design spec, kept as written. Where it describes an outside library manager doing search, adds and deletes, Minstrel now does that itself (M502).
+
 ## 1. Overview
 
 A self-hosted music server and streaming backend built to close a real gap in the self-hosted music ecosystem: **state and intelligence belong on the server, not the client.** Existing Subsonic-compatible servers (Navidrome, Gonic, Airsonic-Advanced) defer all of the "smart" behavior — shuffle logic, radio, play count semantics, like management — to clients. The result is fragmented experience across devices: a song liked on one client is unknown to another; shuffle quality depends on which app you opened; play counts diverge. This project centralizes those decisions on the server so every client sees the same canonical state.