feat(parser): extract Java microservice config from annotations and YAML

[JoseJacin]

Linked issue:

No related issue — new feature contribution.

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What & why:

Adds two capabilities to the knowledge graph:

1. Java annotation extraction — reads @RegisterRestClient, @Path, @GET/@POST/@PUT/@DELETE/@PATCH, and @ConfigProperty from .java files
2. Config file parsing — parses application*.yml, application*.yaml, and .properties files as new languages quarkus-config / properties

Both emit a new node kind Config with edges CONFIGURES, SUBSCRIBES, PRODUCES, CONSUMES.

Why: enables cross-repo queries like "which services call this endpoint?" or "what topics does this service produce?" without reading any source file manually.

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Example — REST Client interface

@RegisterRestClient(configKey = "inventory-api")
@Path("/api/v1/items")
public interface InventoryRestClient {

    @GET
    @Path("/{id}")
    ItemDto getById(@PathParam("id") String id);

    @POST
    ItemDto create(ItemDto dto);

    @DELETE
    @Path("/{id}")
    void delete(@PathParam("id") String id);
}

Graph emits: Class node with rest_client_config_key = "inventory-api", Function nodes with http_method = "GET"/"POST"/"DELETE".

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Example — application.yml

  quarkus:
    rest-client:
      inventory-api:
        url: https://api.example.com/inventory
  mp:
    messaging:
      outgoing:
        order-producer:
          topic: orders
  redis:
    channels:
      - inventory_channel

Graph emits: Config nodes rest-client:inventory-api, kafka:orders (outgoing), redis:channels.

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Example — cross-repo query

-- Which microservices call the inventory service?
SELECT DISTINCT file_path FROM nodes
WHERE kind = 'Config' AND name = 'rest-client:inventory-api'

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How it was tested:

python -m pytest tests/test_parser.py --tb=short -q
123 passed

20 new tests in two classes:

• TestJavaMicroserviceAnnotations (7 tests) — annotation extraction
• TestQuarkusConfigParser (13 tests) — YAML/properties parsing + language detection

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Checklist:

• Tests added for new functionality
• All tests pass (123 passed)
• Linting passes: uv run ruff check code_review_graph/
• Type checking passes: uv run mypy code_review_graph/ --ignore-missing-imports --no-strict-optional
• Docstrings updated on new methods