chore(ci): policy bot diff calc should ignore test files

[jakedoublev]

Proposed Changes

• Policy bot calculation to require multiple reviewers should ignore diff calculations from test files.

Checklist

• I have added or updated unit tests
• I have added or updated integration tests (if appropriate)
• I have added or updated documentation

Testing Instructions

[github-actions]

Benchmark results, click to expand

Benchmark Results:

Metric	Value
Approved Decision Requests	5000
Denied Decision Requests	0
Total Time	475.87291ms

Bulk Benchmark Results

Metric	Value
Total Decrypts	100
Successful Decrypts	100
Failed Decrypts	0
Total Time	373.771044ms
Throughput	267.54 requests/second

TDF3 Benchmark Results:

Metric	Value
Total Requests	5000
Successful Requests	5000
Failed Requests	0
Concurrent Requests	50
Total Time	1m23.512857708s
Average Latency	832.699709ms
Throughput	59.87 requests/second

NANOTDF Benchmark Results:

Metric	Value
Total Requests	5000
Successful Requests	4943
Failed Requests	57
Concurrent Requests	50
Total Time	1m13.710387655s
Average Latency	734.432615ms
Throughput	67.06 requests/second

Error Summary:

Error Message	Occurrences
ReadNanoTDF error: getNanoRewrapKey: rewrapError: internal: internal error rpc error: code = Internal desc = could not perform access	57 occurrences

Standard Benchmark Metrics Skipped or Failed