Merge Go frontend (apiserver + xcecli) into meson build

src/controller/CLAUDE.md

@@ -0,0 +1,34 @@
+# XCE Controller
+
+## Overview
+C daemon managing cluster-level job and queue operations. Acts as the central coordinator between the scheduler, worker nodes, and the Go API server.
+
+## Build
+```bash
+# From workspace root
+nix develop
+meson build && ninja -C build
+```
+
+## Architecture
+Core source files handle distinct domains:
+- `job.c` — Job lifecycle management
+- `queue.c` — Queue state and control
+- `cluster.c` — Cluster topology
+- `dataex.c` — Data exchange with other daemons
+
+Links against `libxce` from `src/lib/`.
+
+## Conventions
+- C standard: C99 or later
+- Format with `clang-format`
+- Component-specific headers in `include/`
+- Shared types defined in `src/include/xce/` (libxce)
+
+## Key Files
+- `src/controller/` — Controller source files
+- `include/` — Controller-specific headers
+
+## See Also
+- Shared library: `src/lib/CLAUDE.md`
+- Root guidelines: `/workspace/CLAUDE.md`