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/AutoTellTabsService.cs

@@ -9,6 +9,7 @@ using HellionChat.Code;
 using HellionChat.GameFunctions.Types;
 using HellionChat.Resources;
 using HellionChat.Util;
+using Microsoft.Extensions.Logging;
 
 namespace HellionChat;
 
@@ -19,6 +20,7 @@ internal sealed class AutoTellTabsService : IDisposable
     private readonly Plugin _plugin;
     private readonly MessageManager _messageManager;
     private readonly MessageStore _store;
+    private readonly ILogger<AutoTellTabsService> _logger;
     private readonly object _tempTabsLock = new();
 
     // Hard cap on pinned TempTabs so the sidebar doesn't inflate over years
@@ -29,11 +31,17 @@ internal sealed class AutoTellTabsService : IDisposable
 
     private bool _initialized;
 
-    internal AutoTellTabsService(Plugin plugin, MessageManager messageManager, MessageStore store)
+    internal AutoTellTabsService(
+        Plugin plugin,
+        MessageManager messageManager,
+        MessageStore store,
+        ILogger<AutoTellTabsService> logger
+    )
     {
         _plugin = plugin;
         _messageManager = messageManager;
         _store = store;
+        _logger = logger;
     }
 
     // Derived from the tab list on read. Pin/Unpin/Promote/Logout simply
@@ -67,7 +75,7 @@ internal sealed class AutoTellTabsService : IDisposable
     private void RehydratePinnedTabs()
     {
         var pinned = Plugin.Config.Tabs.Count(TabLifecycleHelpers.IsInPinnedPool);
-        Plugin.LogProxy.Debug($"[Pin] Rehydrate scan: {pinned} pinned tab(s) found");
+        _logger.LogDebug($"[Pin] Rehydrate scan: {pinned} pinned tab(s) found");
 
         foreach (var tab in Plugin.Config.Tabs)
         {
@@ -76,7 +84,7 @@ internal sealed class AutoTellTabsService : IDisposable
 
             if (tab.TellTarget is null || !tab.TellTarget.IsSet())
             {
-                Plugin.LogProxy.Warning(
+                _logger.LogWarning(
                     $"[Pin] Pinned tab '{tab.Name}' has no usable TellTarget "
                         + $"(Name={tab.TellTarget?.Name ?? "<null>"} World={tab.TellTarget?.World ?? 0}). "
                         + "Chat input on this tab will be empty until the partner sends a tell or you /tell manually."
@@ -93,7 +101,7 @@ internal sealed class AutoTellTabsService : IDisposable
             // sees the recent conversation, not a blank tab.
             PreloadHistory(tab, tab.TellTarget.Name, tab.TellTarget.World, Guid.Empty);
 
-            Plugin.LogProxy.Debug(
+            _logger.LogDebug(
                 $"[Pin] Rehydrated '{tab.Name}' -> Tell target {tab.TellTarget.Name}@{tab.TellTarget.World}"
             );
         }
@@ -130,7 +138,7 @@ internal sealed class AutoTellTabsService : IDisposable
         if (partner == null)
         {
             // Diagnostics: helps detect regressions (FFXIV payload changes, new edge cases)
-            Plugin.LogProxy.Warning(
+            _logger.LogWarning(
                 $"[AutoTellTabs] Could not extract tell partner. type={message.Code.Type}, "
                     + $"senderChunks={message.Sender.Count}, contentChunks={message.Content.Count}, "
                     + $"senderSourcePayloads={message.SenderSource?.Payloads?.Count ?? 0}, "
@@ -361,7 +369,7 @@ internal sealed class AutoTellTabsService : IDisposable
         catch (Exception ex)
         {
             // Non-fatal: tab still spawns with visible error notice instead of silent history loss
-            Plugin.LogProxy.Error(ex, "[AutoTellTabs] History preload failed");
+            _logger.LogError(ex, "[AutoTellTabs] History preload failed");
             tab.Messages.AddPrune(
                 MakeSystemMarker(HellionStrings.AutoTellTabs_HistoryLoadError),
                 MessageManager.MessageDisplayLimit
@@ -456,7 +464,7 @@ internal sealed class AutoTellTabsService : IDisposable
     {
         if (!tab.IsTempTab || tab.IsPinned)
         {
-            Plugin.LogProxy.Debug(
+            _logger.LogDebug(
                 $"[Pin] TryPin skipped: IsTempTab={tab.IsTempTab} IsPinned={tab.IsPinned}"
             );
             return false;
@@ -472,7 +480,7 @@ internal sealed class AutoTellTabsService : IDisposable
         }
 
         tab.IsPinned = true;
-        Plugin.LogProxy.Debug(
+        _logger.LogDebug(
             $"[Pin] Pinned tab '{tab.Name}' target={tab.TellTarget?.Name}@{tab.TellTarget?.World}"
         );
         _plugin.SaveConfig();
@@ -495,7 +503,7 @@ internal sealed class AutoTellTabsService : IDisposable
         }
 
         tab.IsPinned = false;
-        Plugin.LogProxy.Debug("[Pin] Unpinned tab '{tab.Name}'");
+        _logger.LogDebug("[Pin] Unpinned tab '{TabName}'", tab.Name);
         _plugin.SaveConfig();
     }
 
@@ -509,9 +517,7 @@ internal sealed class AutoTellTabsService : IDisposable
         tab.IsTempTab = false;
         tab.IsPinned = false;
         tab.TellTarget = TellTarget.Empty();
-        Plugin.LogProxy.Debug(
-            $"[Pin] Promoted tab '{tab.Name}' to permanent (tell-binding dropped)"
-        );
+        _logger.LogDebug($"[Pin] Promoted tab '{tab.Name}' to permanent (tell-binding dropped)");
         _plugin.SaveConfig();
     }
 }