Service/Application Dependency Graph Implement

[ambiguous-pointer]

This change introduces a complete service and application topology visualization feature based on
discussion #1398 and
issue #1430.

It adds both backend graph APIs and frontend AntV G6 visualization for tracing upstream/downstream
relationships via ServiceProviderMetadataResource and ServiceConsumerMetadataResource.

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📌 What’s New

• Application-level topology graph
  GET /application/graph returns provider/consumer application relations as typed nodes
  and edges. Each node declares its type (application) and rule (provider/consumer/empty).

• Service-level topology graph
  GET /service/graph returns provider/consumer applications for a given service as a graph.
  A central service node is connected to provider and consumer app nodes.

• Service detail API
  GET /service/detail returns aggregated service metadata (language, method names) derived
  from all provider instances sharing the same serviceKey.

• Service resource derivation
  ServiceProviderMetadataEventSubscriber now maintains Service resources by aggregating
  methods from all provider instances. Language is auto-detected from provider metadata
  parameters and method type signatures (golang/java).

• Graph payload structure

  {
      "code": "Success",
      "message": "success",
      "data": {
          "nodes": [
              {
                  "id": "order-service",
                  "label": "order-service",
                  "type": "application",
                  "rule": "provider"
              },
              {
                  "id": "com.ecommerce.api.service.OrderService::",
                  "label": "com.ecommerce.api.service.OrderService::",
                  "type": "service",
                  "rule": ""
              },
              {
                  "id": "payment-service",
                  "label": "payment-service",
                  "type": "application",
                  "rule": "consumer"
              }
          ],
          "edges": [
              {
                  "source": "com.ecommerce.api.service.OrderService::",
                  "target": "order-service",
                  "data": { "type": "provides" }
              },
              {
                  "source": "payment-service",
                  "target": "com.ecommerce.api.service.OrderService::",
                  "data": { "type": "consumes" }
              }
          ]
      }
  }
  

• Frontend topology visualization
  New Topology tab components for both Applications and Services pages, rendered using AntV G6
  with Vue-node integration. Clicking a node opens a detail drawer.
• New indexes for efficient queries
  • idx_service_consumer_service_key on ServiceConsumerMetadataKind
  • idx_service_name on ServiceKind
• Service proto simplification
  Service.{providers,consumers,features} replaced with a single methods []string field,
  derived by aggregating method names from all provider instances.

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📁 Affected Areas / Review Checklist

• Console API (service package handlers)
• User Experience (graph visualization output)
• Core Component (discovery subscriber, indexers)
• Docs
• Dubboctl
• Feature

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud