feat(pipeline): add runnable artifact pipeline increment

[Change Nature]
- This commit adds the first runnable increment of the F# artifact
  pipeline: CLI, server, frontend bundle, stage fixture, and tests.
  It is feature work, not a bug fix.

[New Capability]
- CLI `run` executes the three-step Blender fixture through the process
  bridge and writes GLBs, step logs, events, and a manifest; `verify`
  validates a manifest without Blender.
- Server exposes run start, run-scoped SSE, artifact manifest/file
  routes, and serves the Fable frontend from its build output.
- Frontend starts runs, follows run-scoped SSE progress, and links the
  artifact manifest on completion.

[Implementation]
- Shared layer holds domain, run state, replay, and artifact contracts;
  Modeling holds the pipeline, 120s bridge timeout, and result-file
  protocol; stage/blender/fixture.py owns geometry in Python (bpy owns
  geometry, F# owns orchestration).
- Fable bundle is regenerated into public/ and copied by the server
  project; solution includes all projects with warnings-as-errors.
- README documents build, Fable, server, interpreter/env, fixture
  limitations, and current verification status.

[Impact]
- Verified: 40/40 solution tests pass; Release build 0 warnings/errors;
  real CLI run with bpy 5.0.1 produced 3 GLBs, 3 logs, and a
  verify-clean manifest; isolated-port server smoke flow succeeded.
- Not yet verified: browser end-to-end behavior and production
  fidelity. Artifacts and caches are gitignored.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/SomhairlesDream.Server/SomhairlesDream.Server.fsproj b/src/SomhairlesDream.Server/SomhairlesDream.Server.fsproj
new file mode 100644
index 0000000..17c159d
--- /dev/null
+++ b/src/SomhairlesDream.Server/SomhairlesDream.Server.fsproj
@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>SomhairlesDream.Server</RootNamespace>
+    <AssemblyName>SomhairlesDream.Server</AssemblyName>
+    <OutputType>Exe</OutputType>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="../SomhairlesDream.Shared/SomhairlesDream.Shared.fsproj" />
+    <ProjectReference Include="../SomhairlesDream.Modeling/SomhairlesDream.Modeling.fsproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Store.fs" />
+    <Compile Include="ArtifactRunCoordinator.fs" />
+    <Compile Include="ArtifactRunApi.fs" />
+    <Compile Include="Program.fs" />
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="../../public/**/*" Link="public/%(RecursiveDir)%(Filename)%(Extension)" CopyToOutputDirectory="PreserveNewest" CopyToPublishDirectory="PreserveNewest" />
+  </ItemGroup>
+</Project>