fix(judge): make weighted criterion evidence authoritative

[seonghobae]

Superseded by live parent implementation

This successor originally carried #1235/#1238 on top of fix-assert-validations-7577214956643354730@4163bbb42763282c0b7729c37e8b919895141a5f.

During concurrent development, that exact parent branch advanced to e4d170040ed2230bef8133855826fbdfaec29b86 and independently implemented the same two bounded defects in llm_judge.py: aggregate criterion-weight overflow now fails before transport, and the direct/plain result derives its authoritative score/decision from validated weighted criterion evidence while retaining top-level score validation. Fresh tests on the parent cover both regressions, and its repository-local CI/Security/SAST/CodeQL are exact-head green.

Because this branch is now 3 commits ahead / 1 behind the live parent with overlapping implementations of the same mutable source and issue scope, retaining it would create a competing writer rather than add distinct product value. No rebase, force-push, or duplicate merge is performed. The live implementation is adopted in PR #1019, whose body now closes #1235 and #1238 and documents the expanded scope.

Historical lineage retained for audit only:

• RED 4ee40e6b139da203194dafaeabed6a9d2550ecfa
• GREEN e52c79be5126eb00eecfe59addf98f099afdaff1
• evidence 74da6ae89b9e2b787a85e72b0df091c1f84bec3b

Closed without merge as superseded; no product requirement is being dropped.

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Devin Review found 1 potential issue.