Follow-up-Precision-Fix

RETRIEX_DIAGNOSTICS_REGRESSION_HOTFIX_README.md

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+# RetrieX Diagnostics/Regression Hotfix
+
+Patch-only hotfix for the diagnostics/regression tooling.
+
+## Fixed
+
+- `commerce_query.patterns.history_context` is now validated as a regex fragment, not as a full delimited regex.
+- `commerce_query.patterns.filter_search_tokens` is now validated as a normal token list, not as a list of regex patterns.
+- The regression check for the Shopware query optimizer prompt no longer expects a JSON instruction. The current stable prompt intentionally asks for a plain keyword search query, so the check now validates the actual output instruction.
+
+## Not changed
+
+- No retrieval logic changed.
+- No prompt wording changed.
+- No shop/search/runtime logic changed.
+- No YAML config changed.
+
+## After applying
+
+Clear Symfony cache, then run:
+
+```bash
+php bin/console mto:agent:config:validate
+php bin/console mto:agent:regression:test
+```