fix(discord): add missing Dapper.AOT reference to DiscordBot project

GmRelay.Shared references Dapper.AOT with PrivateAssets=all, which
prevents the runtime DLL from flowing to downstream projects. Telegram
bot works because it explicitly references Dapper.AOT directly, but
Discord bot did not — causing FileNotFoundException for Dapper.AOT
at runtime, breaking the scheduler and slash commands.

- Add Dapper.AOT 1.0.48 to GmRelay.DiscordBot.csproj
- Add regression test: DiscordWorkerProject_ShouldExist asserts
  Dapper.AOT is present in the DiscordBot csproj
- Bump version → 3.0.9

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj

@@ -6,6 +6,8 @@
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <UserSecretsId>dotnet-GmRelay.DiscordBot-issue-26</UserSecretsId>
+    <!-- DiscordBot uses vanilla Dapper in its own handlers; DAP005 requires AOT-enabled Dapper -->
+    <NoWarn>$(NoWarn);DAP005</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>

src/GmRelay.DiscordBot/packages.lock.json

@@ -28,6 +28,12 @@
         "resolved": "2.1.72",
         "contentHash": "ns4mGqQd9a/MhP8m6w556vVlZIa0/MfUu03zrxjZC/jlr1uVCsUac8bkdB+Fs98Llbd56rRSo1eZH5VVmeGZyw=="
       },
+      "Dapper.AOT": {
+        "type": "Direct",
+        "requested": "[1.0.48, )",
+        "resolved": "1.0.48",
+        "contentHash": "rsLM3yKr4g+YKKox9lhc8D+kz67P7Q9+xdyn1LmCsoYr1kYpJSm+Nt6slo5UrfUrcTiGJ57zUlyO8XUdV7G7iA=="
+      },
       "Microsoft.Extensions.Hosting": {
         "type": "Direct",
         "requested": "[10.0.5, )",

tests/GmRelay.Bot.Tests/packages.lock.json

@@ -392,8 +392,8 @@
           "Aspire.Npgsql": "[13.2.2, )",
           "Dapper": "[2.1.72, )",
           "Dapper.AOT": "[1.0.48, )",
-          "GmRelay.ServiceDefaults": "[2.5.0, )",
-          "GmRelay.Shared": "[2.5.0, )",
+          "GmRelay.ServiceDefaults": "[3.0.9, )",
+          "GmRelay.Shared": "[3.0.9, )",
           "Npgsql": "[10.0.2, )",
           "Telegram.Bot": "[22.9.5.3, )",
           "dbup-postgresql": "[7.0.1, )"
@@ -404,8 +404,9 @@
         "dependencies": {
           "Aspire.Npgsql": "[13.2.2, )",
           "Dapper": "[2.1.72, )",
-          "GmRelay.ServiceDefaults": "[2.5.0, )",
-          "GmRelay.Shared": "[2.5.0, )",
+          "Dapper.AOT": "[1.0.48, )",
+          "GmRelay.ServiceDefaults": "[3.0.9, )",
+          "GmRelay.Shared": "[3.0.9, )",
           "NetCord.Hosting": "[1.0.0-alpha.489, )",
           "NetCord.Hosting.Services": "[1.0.0-alpha.489, )",
           "NetCord.Services": "[1.0.0-alpha.489, )",
@@ -436,8 +437,8 @@
         "dependencies": {
           "Aspire.Npgsql": "[13.2.2, )",
           "Dapper": "[2.1.72, )",
-          "GmRelay.ServiceDefaults": "[2.5.0, )",
-          "GmRelay.Shared": "[2.5.0, )",
+          "GmRelay.ServiceDefaults": "[3.0.9, )",
+          "GmRelay.Shared": "[3.0.9, )",
           "Npgsql": "[10.0.2, )",
           "Telegram.Bot": "[22.9.6.1, )"
         }