docs(llm-timeout): 0-as-disable 함정 명시 + HOTFIXES typo + 용어 정리

PR #162 워커 리뷰 반영.

- MEDIUM (W2) + LOW (W1): request_timeout_secs = 0 이 reqwest 의
  의미상 disable 이 아닌 instant timeout (모든 요청 즉시 실패).
  LlmCfg field rustdoc + ollama.rs module-level comment + README
  세 군데에 명시 + u64::MAX / 86400 같은 large finite 값 권장.
- NIT (W1): HOTFIXES 2026-05-25 entry 의 '답변이 인 5분' typo →
  '답변이 5분' (1자 삭제).
- NIT (W1): README + HOTFIXES 의 '확장 도그푸딩' 내부 jargon →
  '후속 도그푸딩' 으로 통일.

코드 동작 변경 없음 — doc only. cargo test request_timeout 3 PASS.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/kebab-llm-local/src/ollama.rs

@@ -54,6 +54,11 @@ use crate::error::LlmError;
 // rebuild. Cold-loading an 8B+ model on first call routinely takes
 // 60-90 s plus multi-minute inference; 300s was the legacy hard
 // ceiling and remains the default for back-compat.
+//
+// Edge case: `request_timeout_secs = 0` becomes
+// `Duration::from_secs(0)` which is reqwest's "fail immediately", NOT
+// "disable". The field doc explains the workaround (use u64::MAX or a
+// large finite value).
 
 /// `reqwest::blocking` adapter implementing [`LanguageModel`] over Ollama's
 /// local HTTP API. Construction is cheap and offline; the first network