Fix live multi-turn: pass the resolved drug, stop did-you-mean garbage

apps/ai-service/bootstrap.py

@@ -51,12 +51,28 @@ def _build_generator(settings: Settings):
         return BedrockClaudeAnswerGenerator(
             region=settings.aws_region, model_id=settings.answer_model_id
         )
+    if settings.answer_provider == "bedrock-converse":
+        from adapters.bedrock_converse import BedrockConverseAnswerGenerator
+
+        return BedrockConverseAnswerGenerator(
+            region=settings.aws_region, model_id=settings.answer_model_id
+        )
     raise ValueError(
         "Unknown ANSWER_PROVIDER. Supported values: disabled (default), "
-        "stub (local, no cloud), bedrock-claude"
+        "stub (local, no cloud), bedrock-claude, bedrock-converse"
     )
 
 
+def _build_reranker(settings: Settings):
+    """A Cohere reranker, or None when disabled. Only used on the similarity /
+    overview fallback; the section route never reranks."""
+    if not settings.rerank_enabled:
+        return None
+    from adapters.bedrock_converse import BedrockCohereReranker
+
+    return BedrockCohereReranker(region=settings.aws_region)
+
+
 def build_runtime(settings: Settings):
     metrics = _build_metrics(settings)
     if settings.embedding_provider == "disabled":
@@ -91,6 +107,7 @@ def build_runtime(settings: Settings):
         QdrantParentStore(client, settings.qdrant_collection),
         EvidencePolicy(minimum_score=settings.evidence_minimum_score),
         section_resolver=section_resolver,
+        reranker=_build_reranker(settings),
     )
     routing = QueryRoutingService(retrieval, resolver)
     answers = GroundedAnswerService(