[codex] Fix deviation failure warning without metadata

[FlorianPfaff]

Summary

• Stop indexing failed result rows as if they contained filterName and filterParams metadata.
• Emit a warning using the result row index and the number of infinite deviations instead.
• Add a regression test where missing estimates trigger the warning path without crashing.

Root Cause

determine_all_deviations receives result rows, but the failure-warning path treated each row like a filter config dictionary. If a missing estimate produced an infinite deviation, the warning code could raise a secondary exception while trying to access nonexistent metadata keys.

Validation

• Not run locally; this workspace is read-only and the change was made through the GitHub connector.
• Added tests/test_determine_all_deviations.py to cover the missing-estimate warning path.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ COPYPASTE	jscpd	yes		no	no	18.62s
✅ JSON	prettier	2	0	0	0	0.45s
✅ JSON	v8r	2		0	0	2.25s
✅ MARKDOWN	markdownlint	2	0	0	0	0.72s
✅ MARKDOWN	markdown-table-formatter	2	0	0	0	0.22s
✅ PYTHON	bandit	383		0	0	5.97s
✅ PYTHON	black	383	1	0	0	8.85s
✅ PYTHON	flake8	383		0	0	3.29s
✅ PYTHON	isort	383	1	0	0	0.74s
✅ PYTHON	mypy	383		0	0	5.3s
✅ PYTHON	pylint	383		0	0	120.58s
✅ PYTHON	ruff	383	1	0	0	0.07s
✅ REPOSITORY	checkov	yes		no	no	24.71s
✅ REPOSITORY	gitleaks	yes		no	no	11.62s
✅ REPOSITORY	git_diff	yes		no	no	0.03s
✅ REPOSITORY	secretlint	yes		no	no	7.19s
✅ REPOSITORY	syft	yes		no	no	3.42s
✅ REPOSITORY	trivy-sbom	yes		no	no	2.58s
✅ REPOSITORY	trufflehog	yes		no	no	21.62s
✅ YAML	prettier	4	0	0	0	0.48s
✅ YAML	v8r	4		0	0	5.23s
✅ YAML	yamllint	4		0	0	0.45s

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[github-actions]

Test Results

    12 files  ± 0      12 suites  ±0   4h 27m 57s ⏱️ - 19m 3s
 1 092 tests + 2   1 092 ✅ + 2      0 💤 ±0  0 ❌ ±0 
13 388 runs  +24  10 292 ✅ +20  3 096 💤 +4  0 ❌ ±0 

Results for commit 2d29254. ± Comparison against base commit f344bab.