Docs: remove KG QA nav and fix links to modules quality section for strict mkdocs build

docs/reference/conflicts.md

@@ -318,4 +318,4 @@ tracker.set_source_credibility("bad_source", 0.1)
 
 - [Deduplication Module](deduplication.md) - For merging duplicate entities
 - [Normalize Module](normalize.md) - For pre-processing data
-- [KG QA Module](kg_qa.md) - For overall graph quality
+- [Modules Guide](../modules.md#quality-assurance) - Quality assurance overview

docs/reference/reasoning.md

@@ -246,4 +246,4 @@ kg.add_triples(inferred_triples)
 
 - [Ontology Module](ontology.md) - Source of schema-based rules
 - [Triple Store Module](triple_store.md) - Backend for SPARQL reasoning
-- [KG QA Module](kg_qa.md) - Uses reasoning for consistency checking
+- [Modules Guide](../modules.md#quality-assurance) - Consistency checking overview

mkdocs.yml

@@ -114,7 +114,6 @@ nav:
     - Export: reference/export.md
     - Graph Store: reference/graph_store.md
     - Ingest: reference/ingest.md
-    - KG QA: reference/kg_qa.md
     - Knowledge Graph: reference/kg.md
     - Normalize: reference/normalize.md
     - Ontology: reference/ontology.md