fix: yaml stdio per-connection, iac catalog path, makefile port

- yaml-language-server: rewrite to stdio per WebSocket (fixes crash loop)
  vscode-jsonrpc v9 createServerSocketTransport is a TCP client, not server
  now spawns yaml-language-server --stdio per connection via asyncio subprocess

- bicep/modules.py: add /iac_source_catalog.json as first path in _IAC_SOURCE_PATHS
  Dockerfile copies to /iac_source_catalog.json but path wasn't listed

- server.py: remove YAML_LSP_PORT daemon (no longer needed with stdio mode)

- Makefile: add -e HTTP_PORT=$(HEALTH_PORT) to all docker run commands
  server defaulted to :8000 but Makefile exposed :2089 with no override

ilsp/server.py

@@ -31,7 +31,6 @@ logger = logging.getLogger(__name__)
 
 PYTHON_LSP_PORT = int(os.getenv("PYTHON_LSP_PORT", "2087"))
 BICEP_LSP_PORT  = int(os.getenv("BICEP_LSP_PORT",  "2088"))
-YAML_LSP_PORT   = int(os.getenv("YAML_LSP_PORT",   "2090"))
 HTTP_PORT       = int(os.getenv("HTTP_PORT", "8000"))
 
 _CHUNK = 65536
@@ -48,20 +47,6 @@ def _serve_python_lsp(port: int) -> None:
         logger.warning("pylsp exited (code %s) — restarting", proc.returncode)
 
 
-def _serve_yaml_lsp(port: int) -> None:
-    """Start yaml-language-server in TCP socket mode; restart on unexpected exit."""
-    import shutil
-    yaml_ls = shutil.which("yaml-language-server")
-    if not yaml_ls:
-        logger.warning("yaml-language-server not found — /yaml completions disabled")
-        return
-    while True:
-        proc = subprocess.Popen([yaml_ls, f"--socket={port}"])
-        logger.info("yaml-language-server listening on localhost:%d  PID=%d", port, proc.pid)
-        proc.wait()
-        logger.warning("yaml-language-server exited (code %s) — restarting", proc.returncode)
-
-
 async def _pipe(reader: asyncio.StreamReader, writer) -> None:
     """Pipe bytes from reader to writer until EOF."""
     try:
@@ -162,7 +147,7 @@ async def _build_app() -> web.Application:
         return await _ws_proxy(request, "127.0.0.1", BICEP_LSP_PORT)
 
     async def yaml_ws(request: web.Request) -> web.WebSocketResponse:
-        return await yaml_ws_handler(request, YAML_LSP_PORT)
+        return await yaml_ws_handler(request)
 
     app.router.add_get("/health", health)
     app.router.add_post("/reload", reload)
@@ -186,7 +171,7 @@ async def main_async() -> None:
     # LSP servers run internally on localhost — not exposed outside the container
     threading.Thread(target=_serve_python_lsp, args=(PYTHON_LSP_PORT,), daemon=True).start()
     threading.Thread(target=serve_bicep, args=(BICEP_LSP_PORT,), daemon=True).start()
-    threading.Thread(target=_serve_yaml_lsp, args=(YAML_LSP_PORT,), daemon=True).start()
+    # yaml-language-server is spawned per-connection in yaml_ws_handler (--stdio mode)
 
     app = await _build_app()
     runner = web.AppRunner(app)