Add DataFactory.MCP.Core as submodule reference in Fabric.Mcp.Server

- Add DataFactory.MCP as git submodule at external/DataFactory.MCP
- Add project reference using $(RepoRoot) for portability
- Add Apache.Arrow 22.1.0 to Directory.Packages.props (only new dependency needed)
- Microsoft.Identity.Client and Microsoft.Extensions.Http already satisfied transitively
- Build verified: 0 warnings, 0 errors

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Ebram Tawfik

.gitmodules

@@ -0,0 +1,4 @@
+[submodule "external/DataFactory.MCP"]
+	path = external/DataFactory.MCP
+	url = https://github.com/microsoft/DataFactory.MCP.git
+	branch = fabric-mcp-integration

CONTRIBUTING.md

@@ -92,6 +92,9 @@ If you are contributing significant changes, or if the issue is already assigned
       - `{server}.Mcp.Tools.{tool-name}.UnitTests/` - Unit tests require no authentication or test resources
       - `{server}.Mcp.Tools.{tool-name}.LiveTests/` - Live tests depend on Azure resources and authentication
       - `test-resources.bicep` - Infrastructure templates for testing
+- `external/` - Git submodules for external project integrations
+  - `DataFactory.MCP` - [DataFactory.MCP](https://github.com/microsoft/DataFactory.MCP) submodule (used by `Fabric.Mcp.Server`)
+  - Run `git submodule update --init --recursive` after cloning to fetch submodule contents
 - `eng/` - Shared tools, templates, CLI helpers
 - `docs/` - Central documentation and onboarding materials
 
@@ -100,11 +103,13 @@ If you are contributing significant changes, or if the issue is already assigned
 ### Development Process
 
 1. Fork the repository
-2. Create a feature branch
-3. Make your changes
-4. Write or update tests
-5. Test locally
-6. Submit a pull request
+2. Clone with submodules: `git clone --recurse-submodules <your-fork-url>`
+   - If already cloned, run: `git submodule update --init --recursive`
+3. Create a feature branch
+4. Make your changes
+5. Write or update tests
+6. Test locally
+7. Submit a pull request
 
 ### Adding a New Command
 

Directory.Packages.props

@@ -3,6 +3,7 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
   </PropertyGroup>
   <ItemGroup>
+    <PackageVersion Include="Apache.Arrow" Version="22.1.0" />
     <PackageVersion Include="Azure.Containers.ContainerRegistry" Version="1.2.0" />
     <PackageVersion Include="Azure.Communication.Sms" Version="1.0.2" />
     <PackageVersion Include="Azure.Communication.Email" Version="1.0.2" />

external/DataFactory.MCP

@@ -69,6 +69,8 @@
   <ItemGroup>
     <ProjectReference Include="$(RepoRoot)\core\Fabric.Mcp.Core\src\Fabric.Mcp.Core.csproj" />
     <ProjectReference Include="$(RepoRoot)\tools\Fabric.*\src\*.csproj" />
+    <!-- DataFactory.MCP.Core integration (via git submodule at external/DataFactory.MCP) -->
+    <ProjectReference Include="$(RepoRoot)\external\DataFactory.MCP\DataFactory.MCP.Core\DataFactory.MCP.Core.csproj" />
   </ItemGroup>
 
   <ItemGroup>