improve service names (#54)

- embedding-server => model_server
- public-types => public_types
- chatbot-ui => chatbot_ui
- function-calling => function_calling

demos/function_calling/prometheus/prometheus.yaml

@@ -0,0 +1,23 @@
+global:
+  scrape_interval: 15s
+  scrape_timeout: 10s
+  evaluation_interval: 15s
+alerting:
+  alertmanagers:
+  - static_configs:
+    - targets: []
+    scheme: http
+    timeout: 10s
+    api_version: v1
+scrape_configs:
+- job_name: envoy
+  honor_timestamps: true
+  scrape_interval: 15s
+  scrape_timeout: 10s
+  metrics_path: /stats
+  scheme: http
+  static_configs:
+  - targets:
+    - envoy:9901
+  params:
+    format: ['prometheus']