KOL feeds: fix dead/blocked sources, drop stale feeds (29→25)

Feed-health pass over KOL_FEEDS:
- raoulpal: stale Substack (last 2024-05) → Real Vision podcast feed
- dampedspring: paywalled (0 entries) → free "Damped Spring 101" Substack
- unchained: Cloudflare 403 → canonical Megaphone podcast feed
- lynalden: Cloudflare 202 → FeedBurner mirror
- glassnode: recovered via httpx http2=True (was 403 on HTTP/1.1)
- browser User-Agent + Accept headers on feed fetch
- removed dead feeds with no active replacement: placeholder,
  dragonfly, niccarter, eugene
- pin h2==4.3.0 (required by http2=True)

All 25 remaining feeds verified fetching real body content; newest
post per feed ≤88d. Bundles in-flight KOL-module work already in the
working tree (kol_x ingest, migration 027, tests).

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

app/services/tp_sl_monitor.py

@@ -158,6 +158,19 @@ def register_trade(
         and not derisk_ladder):
         return
 
+    # Warn when the price feed doesn't cover this asset — TP/SL/trailing
+    # stops will NEVER fire; only max_hold will exit the position.
+    from app.services.binance import ASSET_MAP
+    from app.services.hl_price_feed import HL_PRICE_ASSETS
+    covered = set(ASSET_MAP.values()) | HL_PRICE_ASSETS
+    if asset not in covered:
+        logger.error(
+            "PRICE FEED GAP: trade %d asset=%s has no price coverage. "
+            "TP/SL/trailing-stop will NOT trigger — only max_hold protects "
+            "this position. Add %susdt to ASSET_MAP in binance.py.",
+            trade_id, asset, asset.lower(),
+        )
+
     _watched[trade_id] = WatchedTrade(
         trade_id=trade_id, wallet=wallet, api_key=api_key, leverage=leverage,
         asset=asset, side=side, entry_price=entry_price,