fix: bump API timeout to 180s, surface raw response in error logs (v0.4.8)

GLM 4.7 Flash was timing out at 120s on large analysis prompts.
Parse failure errors now log the raw LLM response at error level
(not debug) so the root cause is always visible.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to PRAutoBlogger will be documented in this file.
 Format follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project uses [Semantic Versioning](https://semver.org/).
 
+## [0.4.8] — 2026-04-19
+
+### Fixed
+- **GLM 4.7 Flash timeout during analysis.** The model was timing out at 120s on
+  large analysis prompts (especially with the new custom instructions). Bumped
+  API timeout from 120s to 180s.
+- **Empty raw response in error logs.** Parse failure errors now include the raw
+  LLM response inline (first 500 chars) at error level, not debug level, so
+  the actual failure reason is always visible in the Activity Log.
+
 ## [0.4.7] — 2026-04-19
 
 ### Added