refactor(di): migrate services layer to ILogger<T> (DI-4 Slice A)

MessageStore, MessageEnumerator, MessageManager, AutoTellTabsService
move from Plugin.LogProxy / IPluginLogProxy onto
Microsoft.Extensions.Logging.ILogger<T> via constructor injection.

MessageStore additionally takes ILoggerFactory so it can build a
per-instance ILogger<MessageEnumerator> at each of the five reader-
spawning sites; the enumerator is not a container singleton.

PluginHostFactory's MessageManager and AutoTellTabsService factory
lambdas grow to resolve the new logger args; everything else stays in
place.

Site-level migration in the four files:
- MessageStore: 12 calls, _logger field IPluginLogProxy -> ILogger<MessageStore>
- MessageManager: 7 Plugin.LogProxy.* sites, new _logger field
- AutoTellTabsService: 9 Plugin.LogProxy.* sites, new _logger field

Plus a pre-existing template bug surfaced by CA2017: a LogDebug call
in AutoTellTabsService used "{tab.Name}" with no `$` prefix, which
landed in xllog as literal text under Plugin.LogProxy; ILogger now
reads that as a structured placeholder, so the call was promoted to
proper structured logging with tab.Name passed as a parameter.

HellionChat/MessageManager.cs

@@ -14,6 +14,7 @@ using HellionChat.Util;
 using Lumina.Text.Expressions;
 using Lumina.Text.Payloads;
 using Lumina.Text.ReadOnly;
+using Microsoft.Extensions.Logging;
 
 namespace HellionChat;
 
@@ -22,6 +23,7 @@ internal class MessageManager : IAsyncDisposable
     internal const int MessageDisplayLimit = 10_000;
 
     private Plugin Plugin { get; }
+    private readonly ILogger<MessageManager> _logger;
     internal MessageStore Store { get; }
 
     private Dictionary<ChatType, NameFormatting> Formats { get; } = [];
@@ -48,11 +50,21 @@ internal class MessageManager : IAsyncDisposable
     // AutoTellTabsService to spawn or refresh temp tabs without coupling.
     public event Action<Message>? MessageProcessed;
 
-    internal unsafe MessageManager(Plugin plugin)
+    internal unsafe MessageManager(
+        Plugin plugin,
+        ILogger<MessageManager> logger,
+        ILoggerFactory loggerFactory
+    )
     {
         Plugin = plugin;
+        _logger = logger;
 
-        Store = new MessageStore(DatabasePath(), Plugin.PlatformUtil, Plugin.LogProxy);
+        Store = new MessageStore(
+            DatabasePath(),
+            Plugin.PlatformUtil,
+            loggerFactory.CreateLogger<MessageStore>(),
+            loggerFactory
+        );
 
         PendingMessageThread = new Thread(() =>
             ProcessPendingMessages(PendingThreadCancellationToken.Token)
@@ -91,7 +103,7 @@ internal class MessageManager : IAsyncDisposable
             await Task.Delay(100);
 
         if (PendingMessageThread.IsAlive)
-            Plugin.LogProxy.Warning(
+            _logger.LogWarning(
                 "PendingMessageThread did not observe cancellation within 10s. "
                     + "Worker remains on background thread; next plugin reload releases it."
             );
@@ -137,7 +149,7 @@ internal class MessageManager : IAsyncDisposable
                 }
                 catch (Exception ex)
                 {
-                    Plugin.LogProxy.Error(ex, "Error processing pending message");
+                    _logger.LogError(ex, "Error processing pending message");
                 }
             }
             else
@@ -182,12 +194,12 @@ internal class MessageManager : IAsyncDisposable
 
         // Mark failed messages as deleted to prevent retry attempts
         var failedIds = messages.FailedMessageIds();
-        Plugin.LogProxy.Info(
+        _logger.LogInformation(
             $"Marking {failedIds.Count} messages as deleted due to parse failures"
         );
         foreach (var msgId in messages.FailedMessageIds())
         {
-            Plugin.LogProxy.Debug($"Marking message '{msgId}' as deleted due to parse failure");
+            _logger.LogDebug($"Marking message '{msgId}' as deleted due to parse failure");
             Store.DeleteMessage(msgId);
         }
     }
@@ -203,13 +215,13 @@ internal class MessageManager : IAsyncDisposable
             }
             catch (Exception ex)
             {
-                Plugin.LogProxy.Error(ex, "Error in FilterAllTabs");
+                _logger.LogError(ex, "Error in FilterAllTabs");
             }
 
             // v1.4.9 R3 profiling: Information so the xllog tail surfaces this
             // without a Debug filter. Belt-and-suspenders for future plugin-load
             // regressions; remains in place after Sub-Task 3.4 Befund.
-            Plugin.LogProxy.Information($"FilterAllTabs took {stopwatch.ElapsedMilliseconds}ms");
+            _logger.LogInformation($"FilterAllTabs took {stopwatch.ElapsedMilliseconds}ms");
         });
     }
 
@@ -264,7 +276,7 @@ internal class MessageManager : IAsyncDisposable
         }
         catch (Exception ex)
         {
-            Plugin.LogProxy.Error(ex, "Error in ContentIdResolver");
+            _logger.LogError(ex, "Error in ContentIdResolver");
         }
     }