fix: correct endpoint count to 37 in CLAUDE.md + remove dead INTERFACE_METHOD pattern

Review found: documented endpoint count was 39 but actual bullet count is 37
(21 GraphController + 9 TopologyController + 4 FlowController + 3 IntelligenceController).
Also removed unused INTERFACE_METHOD Pattern constant from GoLanguageExtractor
left over after extractInterfaceHints was rewritten to use RECEIVER_METHOD.

Author: aksOps

CLAUDE.md

@@ -171,7 +171,7 @@ code-iq serve /path/to/repo          # needs enrich if using index
 
 ## Server Endpoints (all read-only)
 
-### REST API (`/api`) -- 39 endpoints
+### REST API (`/api`) -- 37 endpoints
 
 **GraphController** (`/api`):
 - `GET /api/stats` -- Rich categorized statistics (graph, languages, frameworks, infra, connections, auth, architecture)

src/main/java/io/github/randomcodespace/iq/intelligence/extractor/go/GoLanguageExtractor.java

@@ -55,12 +55,6 @@ public class GoLanguageExtractor implements LanguageExtractor {
     private static final Pattern SINGLE_IMPORT =
             Pattern.compile("^import\\s+(?:\\w+\\s+)?\"([^\"]+)\"", Pattern.MULTILINE);
 
-    /**
-     * Method signature in an interface: {@code MethodName(params) ReturnType}.
-     */
-    private static final Pattern INTERFACE_METHOD =
-            Pattern.compile("^\\s+(\\w+)\\s*\\(", Pattern.MULTILINE);
-
     /**
      * Go receiver method: {@code func (varName StructName) MethodName(}.
      * Captures: group(1) = struct name (with optional pointer *), group(2) = method name.