fix: AI 플로우 전체 truncation 제거 + Discord 메시지 분할

- task_pipeline.py: summarize()에서 리뷰/코딩 결과 자르기 제거
- discord_bot.py: safe_send_embed() 추가 (4096자 초과 시 분할 전송)
- 리뷰 피드백 자르기 제거 (재시도 시 전체 피드백 전달)

api/discord_bot.py

@@ -19,6 +19,29 @@ from core.gemini_caller import GeminiCaller, GeminiCallError
 
 logger = logging.getLogger("variet.discord")
 
+EMBED_DESC_LIMIT = 4096
+EMBED_FIELD_LIMIT = 1024
+
+
+async def safe_send_embed(channel, embed: discord.Embed):
+    """Embed가 Discord 제한을 초과하면 나눠서 전송."""
+    # description이 길면 분할
+    desc = embed.description or ""
+    if len(desc) <= EMBED_DESC_LIMIT:
+        await channel.send(embed=embed)
+        return
+
+    # 첫 번째: 원래 embed + 잘린 description
+    chunks = [desc[i:i+EMBED_DESC_LIMIT] for i in range(0, len(desc), EMBED_DESC_LIMIT)]
+    embed.description = chunks[0]
+    await channel.send(embed=embed)
+
+    # 나머지: 연속 embed
+    for chunk in chunks[1:]:
+        cont = discord.Embed(description=chunk, color=embed.color)
+        await channel.send(embed=cont)
+
+
 # Bot 설정
 intents = discord.Intents.default()
 intents.message_content = True
@@ -381,7 +404,7 @@ async def _handle_task(message: discord.Message, text: str, ws):
                         color=0xF39C12,
                     )
                 )
-                feedback = review.get("summary", str(review))[:500]
+                feedback = review.get("summary", str(review))
                 for task in tasks:
                     task["review_feedback"] = (
                         f"이전 시도에서 다음 리뷰 피드백을 받았습니다. "
@@ -413,7 +436,7 @@ async def _handle_task(message: discord.Message, text: str, ws):
                 summary_embed.add_field(name=field_name, value=val[:1000], inline=False)
 
         summary_embed.set_footer(text=f"ID: {task_id} | {ws.name}")
-        await message.channel.send(embed=summary_embed)
+        await safe_send_embed(message.channel, summary_embed)
 
         # 기록
         pipeline.docs.record_session(text, summary, plan)