[MEDIUM] Semantic mismatch — nearai_chat.rs test helper supports RFC2822 date parsing b

[ironclaw-ci]

[MEDIUM:85] Issue Found by Staging CI Review

Severity: MEDIUM
Confidence: 85/100
PR comment: #1285 (comment)

Description

Semantic mismatch — nearai_chat.rs test helper supports RFC2822 date parsing but anthropic_oauth.rs and embeddings.rs test helpers don't, creating inconsistent coverage

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Auto-created by staging-ci Claude Code review

[henrypark133]

Triage verdict: DUPLICATE of #1288 — fixed together

The inconsistent RFC2822 support was a symptom of the DRY violation in #1288. All three modules now use the shared parse_retry_after() function in src/llm/retry.rs, which supports both delay-seconds and RFC2822 formats uniformly.