Initial commit: JMon cross-platform monitoring system

- gRPC client-server metrics collection
- PeriodicTimer-based 5-second sampling
- Delta encoding with configurable thresholds
- Queue/retry mechanism for resilience
- ProcessId tracking for duplicate detection
- Server-side state reconstruction
- Native AOT compilation support
- Docker/Podman containerization
- PostgreSQL + TimescaleDB persistence layer

JMonAgent/JMonAgent.csproj

@@ -0,0 +1,30 @@
+<Project Sdk="Microsoft.NET.Sdk.Worker">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UserSecretsId>dotnet-JMonAgent-7f8df008-660b-45a2-b649-64956a63f63c</UserSecretsId>
+    <PublishAot>true</PublishAot>
+    <InvariantGlobalization>true</InvariantGlobalization>
+    <OptimizationPreference>Size</OptimizationPreference>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Google.Protobuf" Version="3.27.0" />
+    <PackageReference Include="Grpc.Net.Client" Version="2.65.0" />
+    <PackageReference Include="Grpc.Tools" Version="2.65.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Protobuf Include="../Protos/metrics.proto" GrpcServices="Client" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(RuntimeIdentifier)' != '' AND $(RuntimeIdentifier.StartsWith('win'))">
+    <PackageReference Include="System.Management" Version="9.0.0" />
+  </ItemGroup>
+</Project>