Accept traced entity capture citations and improve correction feedback

tests/fixtures/interpretation/README.md

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+# Real capture citation regression
+
+`real-capture-citations.json` contains the second completed Gemini interpretation
+from the 2026-10-15 entity resolution trial. Its response is unchanged. The context
+retains the source aliases used by that response and marks the selected entity
+with the new citation policy for testing. It is a context subset, not a complete
+transportable case package.
+
+The response identifies Wild Wolpertinger 23487 and cites its matching lookup fact
+F0027 plus quest mention F0016, without redundantly repeating N0005 in source_ids.
+The test accepts this under the new policy and still reproduces the historical
+rejection under the original policy. No API or live database is needed.