feat: add benchmark-programs — 58 telecom COBOL test programs

作为子目录纳入系统，与核心测试管道协同

Co-Authored-By: Claude <noreply@anthropic.com>

benchmark-programs/cross-cutting/rerun/README.md

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+# RERUN/RESTART Testing
+
+## Test Cases
+
+| Test ID | Description |
+|---------|-------------|
+| RR-N001 | Create initial input data (5 records) |
+| RR-N002 | Process input to output (idempotent operation) |
+| RR-N003 | Re-run idempotent verification (same count/sum) |
+| RR-N004 | Output file already exists (OPEN EXTEND, STATUS check) |
+
+## Features Covered
+- Idempotent re-execution (same data produces same result)
+- OPEN EXTEND for existing output files
+- FILE STATUS checking on file operations
+- Sequential input/output processing
+
+## Expected Results
+All 4 tests should display PASS. Running the program twice should produce identical output.