Add lean investigation sessions with deferred consolidation

src/viano_bug_analysis/llm/gateway.py

@@ -36,7 +36,7 @@ def _schema_check(schema):
 
 def is_investigation_review(request):
     """Route the controller's versioned narrow review, never arbitrary research text."""
-    if request['prompt_version'] not in {'investigation_project_v16','investigation_project_v17','investigation_project_v18'}:
+    if request['prompt_version'] not in {'investigation_project_v16','investigation_project_v17','investigation_project_v18','investigation_project_v19'}:
         return False
     try:
         message = next(m for m in reversed(request['messages']) if m['role'] == 'user')
@@ -155,7 +155,7 @@ class LLMGateway:
                 LOGGER.warning("LLM endpoint unavailable provider=%s code=%s", provider.id, code)
             except ValidationError as invalid:
                 info={'validation_keyword':invalid.validator}
-                if request['prompt_version'] in {'investigation_project_v14','investigation_project_v15','investigation_project_v16','investigation_project_v17','investigation_project_v18'}:
+                if request['prompt_version'] in {'investigation_project_v14','investigation_project_v15','investigation_project_v16','investigation_project_v17','investigation_project_v18','investigation_project_v19'}:
                     from .diagnostics import schema_feedback
                     info.update(schema_feedback(invalid,include_keyword=True))
                 error = LLMError("LLM_OUTPUT_SCHEMA",diagnostics=info)