Complete multi-instance support: Phases 3–6 & deployment

- Implements Phases 3–6: session isolation, cache coordination, primary election, and file system monitor coordination for Jellyfin with PostgreSQL.
- Adds new database entities (Instance, DistributedLock, FileSystemChange) and EF model configurations.
- Includes SQL migration scripts and EF migration for all required tables, columns, and helper functions.
- Updates Device entity and JellyfinDbContext for multi-instance tracking.
- Integrates new DI services for instance registry, distributed locks, cache coordinator, and primary election.
- Adds publishing profiles (Win/Linux/FrameworkDependent) and automation script for deployment.
- Extensive documentation for architecture, setup, and publishing.
- All changes are backward compatible and build successfully.

Jellyfin.Server/Jellyfin.Server.csproj

@@ -14,6 +14,8 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <ApplicationIcon>Jellyfin.Server.ico</ApplicationIcon>
     <IsPackable>true</IsPackable>
+    <!-- Suppress trimming warnings for existing migration and serialization code -->
+    <NoWarn>$(NoWarn);IL2026;IL2072;IL2075</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>
@@ -104,17 +106,18 @@
 
   <ItemGroup>
     <!-- SQL initialization scripts for PostgreSQL -->
-    <None Include="sql\**\*.sql">
+    <None Include="..\sql\**\*.sql">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
       <Pack>false</Pack>
+      <Link>sql\%(RecursiveDir)%(Filename)%(Extension)</Link>
     </None>
   </ItemGroup>
 
   <!-- Post-build event to ensure SQL files are copied -->
   <Target Name="CopySQLFiles" AfterTargets="Build">
     <ItemGroup>
-      <SQLFiles Include="$(ProjectDir)sql\**\*.sql" />
+      <SQLFiles Include="$(ProjectDir)..\sql\**\*.sql" />
     </ItemGroup>
     <Copy SourceFiles="@(SQLFiles)" DestinationFolder="$(OutDir)sql\%(RecursiveDir)" SkipUnchangedFiles="true" />
     <Message Importance="high" Text="Copied SQL files to output directory" />

Jellyfin.Server/Jellyfin.Server.csproj.user

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <NameOfLastUsedPublishProfile>D:\Projects\pgsql-jellyfin\Jellyfin.Server\Properties\PublishProfiles\SelfContained-Win-x64.pubxml</NameOfLastUsedPublishProfile>
+    <NameOfLastUsedPublishProfile>D:\Projects\pgsql-jellyfin\Jellyfin.Server\Properties\PublishProfiles\MultiInstance-FrameworkDependent.pubxml</NameOfLastUsedPublishProfile>
   </PropertyGroup>
 </Project>

Jellyfin.Server/Program.cs

@@ -290,6 +290,11 @@ namespace Jellyfin.Server
             _migrationLogger = StartupLogger.Logger.BeginGroup<JellyfinMigrationService>($"Migration Service");
             var startupConfigurationManager = new ServerConfigurationManager(appPaths, _loggerFactory, new MyXmlSerializer());
             startupConfigurationManager.AddParts([new DatabaseConfigurationFactory()]);
+
+            // Force load database configuration from disk BEFORE initializing DbContext
+            // This ensures database.xml is read from the configured config directory
+            _ = startupConfigurationManager.GetConfiguration("database");
+
             var migrationStartupServiceProvider = new ServiceCollection()
                 .AddLogging(d => d.AddSerilog())
                 .AddJellyfinDbContext(startupConfigurationManager, startupConfig)

Jellyfin.Server/sql/diagnostics.sql

@@ -264,13 +264,11 @@ BEGIN
             ORDER BY mean_exec_time DESC
             LIMIT 10
         LOOP
-            RAISE NOTICE 'Calls: %, Avg: %ms, Max: %ms, Total: %ms, %%: %, Query: %', 
+            RAISE NOTICE 'Calls: %, Avg: %ms, Max: %ms, Total: %ms, Percent: %%', 
                 query_rec.calls, 
                 query_rec.avg_time_ms, 
                 query_rec.max_time_ms, 
-                query_rec.total_time_ms, 
-                query_rec.percent_total, 
-                query_rec.query_preview;
+                query_rec.total_time_ms;
         END LOOP;
     END IF;
 END $$;

Jellyfin.Server/startup.json

@@ -9,6 +9,6 @@
     "CacheDir": "C:/ProgramData/jellyfin/cache",
     "LogDir": "C:/ProgramData/jellyfin/log",
     "TempDir": "C:\\Users\\wjones\\AppData\\Local\\Temp\\jellyfin",
-    "WebDir": "C:/ProgramData/jellyfin/wwwroot"
+    "WebDir": "wwwroot"
   }
 }