优化ai_auto_response提示词与短回复策略：场景优先级、防冲突压缩、记忆相关性筛选、可配置长度限制

- 增加场景优先级规则，技术群优先结论与排查点，降低人设冲突\n- Dify 入参新增上下文压缩、画像与记忆去重、低相关记忆过滤\n- 回复后处理支持配置化长度阈值，并增加总字数上限裁剪\n- 新增 prompt_compact/reply 配置项，便于后续按群微调

plugins/ai_auto_response/config.toml

@@ -53,6 +53,33 @@ long_absent_member_days = 30
 memory_lookback_days = 180
 active_context_hours = 8
 
+[reply]
+social_short_char_limit = 30
+social_short_total_limit = 30
+qa_fast_char_limit = 34
+qa_fast_total_limit = 34
+qa_with_context_sentence_limit = 2
+qa_with_context_chunk_limit = 2
+qa_with_context_char_limit = 32
+qa_with_context_total_limit = 55
+default_char_limit = 28
+default_total_limit = 28
+
+[prompt_compact]
+group_profile_max_chars = 560
+group_profile_max_lines = 10
+context_max_chars = 900
+context_max_lines = 18
+recent_message_max_lines = 8
+recent_message_line_max_chars = 60
+at_member_profile_max_chars = 300
+at_member_profile_max_lines = 8
+member_memory_max_chars = 520
+member_memory_max_lines = 12
+memory_max_chars = 900
+memory_max_lines = 18
+strict_memory_relevance = true
+
 [image]
 recent_followup_window_minutes = 5