fix: remediate all 126 Full-Scale Audit #7 findings across 49 files #51

Job	Run time
ASan + UBSan (Ubuntu)	3m 20s
Build & Test (macos-14)	2m 48s
TSan (Ubuntu)	2m 45s
Server Codecs (Ubuntu)	4m 3s
Build & Test (ubuntu-24.04)	3m 0s
Build & Test (Windows / MSVC)	3m 39s
Fuzz (Ubuntu, Clang-18)	29m 54s
Mutation Testing Baseline (Ubuntu)	20s
Full Suite 394/394 (Ubuntu)	4m 17s
Python SAST (bandit)	12s
UBSan (Ubuntu)	2m 15s
License Compliance	1m 33s
Post-Quantum PQ (Ubuntu)	3m 48s
Benchmarks (Ubuntu)	9m 38s
Secrets Scan (gitleaks)	5s
Coverage (Ubuntu, Clang-18)	2m 14s
	1h 13m 51s

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