refactor(issue): rename 'labels' to 'tags' in issue schemas and related code

.claude/workflows/cli-templates/schemas/issues-jsonl-schema.json

@@ -37,10 +37,10 @@
       "type": "string",
       "description": "Original source URL (for GitHub issues)"
     },
-    "labels": {
+    "tags": {
       "type": "array",
       "items": { "type": "string" },
-      "description": "Issue labels/tags"
+      "description": "Issue tags"
     },
     "extended_context": {
       "type": "object",
@@ -120,7 +120,7 @@
       "priority": 1,
       "context": "Connection pool cleanup only happens when MAX_POOL_SIZE is reached...",
       "source": "discovery",
-      "labels": ["bug", "resource-leak", "critical"],
+      "tags": ["bug", "resource-leak", "critical"],
       "extended_context": {
         "location": "storage/sqlite_store.py:59",
         "suggested_fix": "Implement periodic cleanup or weak references",