Add simulation README for PR cockroachdb#155440

Author: rishabh7m

simulation-readme-20251120-224004.md

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+# PR Simulation README
+
+## Simulation Details
+- **Timestamp**: 2025-11-20T22:40:04+05:30
+- **Original PR**: #155440
+- **Original Title**: rangefeed: reduce interface surface area
+- **Original Author**: stevendanna
+- **Original URL**: https://github.com/cockroachdb/cockroach/pull/155440
+
+## Original PR Timeline
+- **Created**: 2025-10-15T13:42:24Z
+- **Queue Entry**: N/A
+- **CI Start**: N/A
+- **CI Completion**: N/A
+- **Merged**: 2025-10-22T14:29:43Z
+
+## Simulation Purpose
+This PR is part of a merge queue vendor comparison simulation.
+It replicates the timing and behavior of the original PR for testing purposes.
+
+## Timing Information
+- **CI Wait Duration**: N/A
+- **CI Run Duration**: N/A  
+- **Total Queue Duration**: N/A
+
+---
+*Generated by pr-simulation tool at 2025-11-20T22:40:05+05:30*