feat(agent-office): youtube_publisher 에이전트 + 30s 폴링

- YoutubePublisherAgent: 음악 파이프라인의 *_pending 상태를 폴링하여
  텔레그램 단일 채널로 단계별 검토 요청 발송, reply 수신 시 의도 분류
  후 music-lab에 feedback POST
- service_proxy: pipeline list/get/feedback/telegram-msg/lookup-by-msg
  헬퍼 5종 추가 (MUSIC_LAB_URL 사용)
- scheduler: 30초 interval로 poll_state_changes 실행
- telegram webhook: reply_to_message 가 파이프라인 메시지면
  youtube_publisher 로 라우팅 (슬래시 명령보다 우선)
- 테스트 4종 추가 (4 PASS)

agent-office/app/agents/__init__.py

@@ -4,6 +4,7 @@ from .blog import BlogAgent
 from .realestate import RealestateAgent
 from .lotto import LottoAgent
 from .youtube import YouTubeResearchAgent
+from .youtube_publisher import YoutubePublisherAgent
 
 AGENT_REGISTRY = {}
 
@@ -14,6 +15,7 @@ def init_agents():
     AGENT_REGISTRY["realestate"] = RealestateAgent()
     AGENT_REGISTRY["lotto"] = LottoAgent()
     AGENT_REGISTRY["youtube"] = YouTubeResearchAgent()
+    AGENT_REGISTRY["youtube_publisher"] = YoutubePublisherAgent()
 
 def get_agent(agent_id: str):
     return AGENT_REGISTRY.get(agent_id)

agent-office/app/agents/youtube_publisher.py

@@ -0,0 +1,108 @@
+"""텔레그램 단일 채널로 단계별 승인 인터랙션 오케스트레이션."""
+import logging
+
+from .base import BaseAgent
+from . import classify_intent
+from .. import service_proxy
+from ..db import add_log
+from ..telegram.messaging import send_raw
+
+logger = logging.getLogger("agent-office.youtube_publisher")
+
+
+_STEP_TITLES = {
+    "cover_pending":   ("커버 아트", "cover"),
+    "video_pending":   ("영상 비주얼", "video"),
+    "thumb_pending":   ("썸네일", "thumb"),
+    "meta_pending":    ("메타데이터", "meta"),
+    "publish_pending": ("최종 검토 + 발행", "publish"),
+}
+
+
+class YoutubePublisherAgent(BaseAgent):
+    agent_id = "youtube_publisher"
+    display_name = "YouTube 퍼블리셔"
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self._notified_state_per_pipeline: dict[int, str] = {}
+
+    async def poll_state_changes(self) -> None:
+        """주기적으로 호출되어 *_pending 신규 진입 시 텔레그램 발송."""
+        try:
+            pipelines = await service_proxy.list_active_pipelines()
+        except Exception as e:
+            logger.warning("폴링 실패: %s", e)
+            return
+
+        for p in pipelines:
+            state = p.get("state")
+            pid = p.get("id")
+            if pid is None:
+                continue
+            if state in _STEP_TITLES and self._notified_state_per_pipeline.get(pid) != state:
+                await self._notify_step(p)
+                self._notified_state_per_pipeline[pid] = state
+
+    async def _notify_step(self, pipeline: dict) -> None:
+        state = pipeline["state"]
+        title_name, step = _STEP_TITLES[state]
+        body = self._format_body(pipeline, step)
+        track_title = pipeline.get("track_title") or f"Pipeline #{pipeline['id']}"
+        text = (
+            f"🎵 [{track_title}] {title_name} 검토\n\n"
+            f"{body}\n\n"
+            f"➡️ 답장으로 알려주세요: '승인' 또는 '반려 + 수정 방향'"
+        )
+        sent = await send_raw(text=text)
+        if sent.get("ok"):
+            msg_id = sent.get("message_id")
+            try:
+                await service_proxy.save_pipeline_telegram_msg(pipeline["id"], step, msg_id)
+            except Exception as e:
+                logger.warning("telegram-msg 저장 실패: %s", e)
+            add_log(self.agent_id, f"pipeline {pipeline['id']} {step} 알림 전송", "info")
+
+    def _format_body(self, p: dict, step: str) -> str:
+        if step == "cover":
+            return f"🖼️ 커버: {p.get('cover_url', '-')}"
+        if step == "video":
+            return f"🎬 영상: {p.get('video_url', '-')}"
+        if step == "thumb":
+            return f"🎴 썸네일: {p.get('thumbnail_url', '-')}"
+        if step == "meta":
+            m = p.get("metadata", {}) or {}
+            tags = m.get("tags", []) or []
+            description = (m.get("description", "") or "")
+            return (
+                f"📝 제목: {m.get('title', '')}\n"
+                f"🏷️ 태그: {', '.join(tags[:8])}\n"
+                f"📄 설명(앞부분): {description[:200]}"
+            )
+        if step == "publish":
+            r = p.get("review", {}) or {}
+            return (
+                f"AI 검토 결과: {r.get('verdict', '?')} "
+                f"(가중 {r.get('weighted_total', '?')}/100)\n"
+                f"{r.get('summary', '')}"
+            )
+        return ""
+
+    async def on_telegram_reply(self, pipeline_id: int, step: str, user_text: str) -> None:
+        intent, feedback = classify_intent.classify(user_text)
+        if intent == "unclear":
+            await send_raw("다시 입력해주세요. 예: '승인' 또는 '반려, 제목 짧게'")
+            return
+        try:
+            await service_proxy.post_pipeline_feedback(pipeline_id, step, intent, feedback)
+        except Exception as e:
+            await send_raw(f"⚠️ 처리 실패: {e}")
+
+    async def on_schedule(self) -> None:
+        await self.poll_state_changes()
+
+    async def on_command(self, command: str, params: dict) -> dict:
+        return {"ok": False, "message": f"Unknown command: {command}"}
+
+    async def on_approval(self, task_id: str, approved: bool, feedback: str = "") -> None:
+        pass