feat(news): F1 — monitor RSS best-effort + comando /news manual

src/news/monitor.py: 7 feeds UAP/OVNI, matching normalizado (NFKD sin tildes)
con word-boundary para tokens cortos (uap/ufo/nhi/aaro/ovni) y substring para
frases. poll_feeds aísla cada feed (uno caído nunca tumba el run) y parsea en
hilo aparte para no bloquear el event loop; cold-start por fuente (siembra sin
notificar). format_digest agrupa por fuente y trocea <4000 chars. /news refresca
y muestra novedades 24h. Capa desacoplada: src/news NO importa de src/bot.
No toca el scheduler (F2).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/bot/bot.py

@@ -22,6 +22,7 @@ from src.db.database import get_db, close_db, ResearchDB, ResearchStatus, Output
 from src.scraper.exhaustive import ExhaustiveScraper
 from src.processor.processor import OllamaClient, ContentProcessor
 from src.generator.generator import OutputGenerator
+from src.news.monitor import poll_feeds, item_from_row, format_digest
 
 logger = structlog.get_logger()
 
@@ -503,6 +504,33 @@ async def cmd_outputs(update: Update, ctx: ContextTypes.DEFAULT_TYPE):
         await db_conn.close()
 
 
+async def cmd_news(update: Update, ctx: ContextTypes.DEFAULT_TYPE):
+    """Monitor RSS manual (sin scheduler — F2 lo automatiza). Refresca news_seen
+    (siembra en cold-start) y muestra las novedades matcheadas de las últimas 24h."""
+    if not is_authorized(update.effective_user.id):
+        return
+
+    db_conn = await get_db()
+    db = ResearchDB(db_conn)
+    try:
+        await update.message.reply_text("📡 Buscando novedades UAP/OVNI…")
+        try:
+            await poll_feeds(db, settings)  # refresca tabla (siembra en cold-start)
+        except Exception:
+            logger.exception("news poll failed")  # best-effort: nunca rompe el comando
+
+        recent = await db.get_recent_news(24)
+        if not recent:
+            await update.message.reply_text("Sin novedades UAP/OVNI en las últimas 24h.")
+            return
+
+        items = [item_from_row(r) for r in recent]
+        for chunk in format_digest(items):
+            await update.message.reply_text(chunk, disable_web_page_preview=False)
+    finally:
+        await db_conn.close()
+
+
 async def cmd_costs(update: Update, ctx: ContextTypes.DEFAULT_TYPE):
     if not is_authorized(update.effective_user.id):
         return
@@ -1292,6 +1320,7 @@ def create_bot() -> Application:
     app.add_handler(CommandHandler("generate", cmd_generate))
     app.add_handler(CommandHandler("sources", cmd_sources))
     app.add_handler(CommandHandler("outputs", cmd_outputs))
+    app.add_handler(CommandHandler("news", cmd_news))
     app.add_handler(CommandHandler("export", cmd_export))
     app.add_handler(CommandHandler("costs", cmd_costs))
     app.add_handler(CommandHandler("watch", cmd_watch))