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

Makefile

@@ -28,6 +28,7 @@ run: stop             ## Build and start container (rebuilds image)
 		-p $(PYTHON_PORT):$(PYTHON_PORT) \
 		-p $(BICEP_PORT):$(BICEP_PORT) \
 		-p $(HEALTH_PORT):$(HEALTH_PORT) \
+		-e HTTP_PORT=$(HEALTH_PORT) \
 		-e DEVOPS_MCP_URL=$(DEVOPS_MCP_URL) \
 		-e PYTHONUNBUFFERED=1 \
 		$(IMAGE):$(TAG)
@@ -43,6 +44,7 @@ run-quick:            ## Start container without rebuilding image
 		-p $(PYTHON_PORT):$(PYTHON_PORT) \
 		-p $(BICEP_PORT):$(BICEP_PORT) \
 		-p $(HEALTH_PORT):$(HEALTH_PORT) \
+		-e HTTP_PORT=$(HEALTH_PORT) \
 		-e PYTHONUNBUFFERED=1 \
 		$(IMAGE):$(TAG)
 	@sleep 5
@@ -55,6 +57,7 @@ run-with-data:        ## Start container with local data dir mounted (test volum
 		-p $(PYTHON_PORT):$(PYTHON_PORT) \
 		-p $(BICEP_PORT):$(BICEP_PORT) \
 		-p $(HEALTH_PORT):$(HEALTH_PORT) \
+		-e HTTP_PORT=$(HEALTH_PORT) \
 		-e PYTHONUNBUFFERED=1 \
 		-v "$(DEVOPS_MCP_REPO):/data:ro" \
 		$(IMAGE):$(TAG)