Audit #8: fix 32 findings across 27 files (2C/10H/12M/8L) #66

Job	Run time
Build & Test (Windows / MSVC)	3m 45s
UBSan (Ubuntu)	2m 32s
ASan + UBSan (Ubuntu)	4m 5s
Coverage (Ubuntu, Clang-18)	3m 12s
Build & Test (ubuntu-24.04)	3m 15s
Fuzz (Ubuntu, Clang-18)	31m 2s
Full Suite 394/394 (Ubuntu)	4m 31s
Build & Test (macos-14)	42s
Server Codecs (Ubuntu)	4m 19s
TSan (Ubuntu)	3m 15s
Benchmarks (Ubuntu)	2m 17s
Python SAST (bandit)	9s
Secrets Scan (gitleaks)	6s
Mutation Testing Baseline (Ubuntu)	36s
License Compliance	1m 28s
Post-Quantum PQ (Ubuntu)	4m 17s
	1h 9m 31s

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