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>

tests/test_production_readiness.py

@@ -41,6 +41,12 @@ class _Trade:
     pnl_usd = 2.25
 
 
+class _ClosedTrade(_Trade):
+    """Same as _Trade but with closed_at set, simulating a committed close."""
+    from datetime import datetime, timezone
+    closed_at = datetime(2026, 1, 1, 0, 0, 0)
+
+
 class _Sub:
     leverage = 3
     hl_api_key = None
@@ -65,7 +71,10 @@ async def test_manual_close_returns_close_result(monkeypatch):
 
     monkeypatch.setattr(bot_engine, "close_and_finalize", fake_close_and_finalize)
 
-    db = _Db([_Trade(), _Sub(), _Trade()])
+    # Responses in order: load trade → load sub → populate_existing re-read
+    # (B45 fix: one query with populate_existing=True instead of old stale cache).
+    # _ClosedTrade has closed_at set so the B46 success guard passes.
+    db = _Db([_Trade(), _Sub(), _ClosedTrade()])
 
     result = await positions.manual_close(7, _Request(), db)