fix: demote disconnect-caused stateless session crash logs #5650

Job	Run time
Site (astro check + eslint a11y)	36s
Detect relevant changes	6s
Check uv.lock	13s
Docker & Add-on Validation	1m 7s
AST Lint	17s
Component Version Gate	6s
Mypy Type Check	38s
Docs Size Check	6s
Ruff Lint	22s
Unit Tests	3m 10s
E2E Validation (embedded, ubuntu-24.04-arm)	5m 6s
E2E Validation (ubuntu-latest)	5m 59s
E2E Validation (update path)	3m 13s
E2E Validation (embedded, ubuntu-latest)	6m 21s
E2E Validation (ubuntu-24.04-arm)	4m 20s
E2E Validation Gate	3s
	31m 43s

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