patch 6.1

RETRIEX_PATCH_6_1_AUDIT_GAP_CLEANUP_README.md

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+# RetrieX Patch 6.1 - Audit Gap Cleanup
+
+Scope: close the remaining config-source audit gaps that still reported `fallback_accessors_missing_yaml` after Patch 6.
+
+This patch intentionally does not remove PHP fallbacks yet and does not change runtime logic. It only adds the missing YAML keys with values copied 1:1 from the current PHP defaults so the following accessors have an explicit YAML source:
+
+- `AgentRunnerConfig::getOptimizedShopQueryTrimCharacters()`
+- `NdjsonHybridRetrieverConfig` retrieval vocabulary lists
+- `PromptBuilderConfig::getTechnicalProductKeywords()`
+- `PromptBuilderConfig::getAccessoryRequestKeywords()`
+
+Changed files:
+
+- `config/retriex/agent.yaml`
+- `config/retriex/retrieval.yaml`
+- `config/retriex/prompt.yaml`
+
+Recommended checks after applying:
+
+```bash
+php bin/console cache:clear
+php bin/console mto:agent:config:validate
+php bin/console mto:agent:config:audit-source --details
+php bin/console mto:agent:regression:test
+```
+
+Expected audit improvement:
+
+- `fallback_accessors_missing_yaml` should drop from `12` to `0`.
+
+`constructor_defaults_without_yaml_mapping` may still remain and should be handled separately before strict validation is enabled.