Pre-launch hardening: KOL module, Telegram, scanners, WS resilience

Big-picture changes since b941223:

KOL pipeline (new) — Substack/podcast/blog RSS → AI ticker extraction →
on-chain wallet diff → talks-vs-trades divergence detection. Daily polls,
19 feeds, divergence emits Post + Telegram fan-out.

Telegram push (new) — walletless free tier + wallet-linked Pro upgrade,
in-bot preference commands (/trump /btc /funding /kol /conf /quiet),
signed-envelope API for dashboard. Disconnect-wallet keeps free
subscription.

BTC funding-rate reversal scanner (new) — hourly cron, 30d cumulative
funding threshold + mean-revert + 7d price confirm, emits via
/api/signals/ingest. BTC bottom-reversal scanner promoted to System 2.

WS broadcast rewrite — per-client send timeout + parallel fan-out
(asyncio.gather). Fixes "Binance WS no close frame" reconnect storms +
APScheduler 11-min job misses, both caused by one slow client stalling
the kline loop.

Error visibility — three silent-error sites (trumpstruth/truth_social
fetchers, funding_reversal scanner) now include exception type name so
httpx ConnectError-style empty-message errors stop logging blank lines.
Telegram bot loop now classifies ReadTimeout vs network vs unknown +
logger.exception for the unknown bucket.

Security hygiene — trumpsignal.db untracked from git (held subscriber
wallets + encrypted HL keys + 22 bot trades); .gitignore now blocks
*.db/.next/backups. CORS only allows FRONTEND_URL in production.

New ops scripts —
  - scripts/preflight.py: env/DB/Telegram/AI auth verification gate
  - scripts/backup_db.sh: cron-friendly daily DB backup (SQLite + Postgres)
  - scripts/seed_kol_wallets.py: idempotent KOL on-chain wallet seeder

15 new Alembic migrations (007-021) covering convex strategy fields,
phase-1 safety, two-system frozen exits, invalidation prices, dynamic
SYS2 leverage, staged de-risk + pyramiding, peak gain tracking, risk
mode, auto-trade + grow flags, KOL module, KOL on-chain, KOL divergence,
Telegram bindings + walletless.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

alembic/versions/019_kol_divergence.py

@@ -0,0 +1,48 @@
+"""kol_divergence table — talks-vs-trades cross-signal
+
+Revision ID: 019
+Revises: 018
+Create Date: 2026-05-23
+"""
+from alembic import op
+import sqlalchemy as sa
+
+revision = "019"
+down_revision = "018"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "kol_divergence",
+        sa.Column("id",           sa.Integer,  primary_key=True),
+        # Which KOL + asset
+        sa.Column("handle",       sa.String(64),  nullable=False, index=True),
+        sa.Column("ticker",       sa.String(32),  nullable=False),
+        # Content side (B-tier)
+        sa.Column("post_id",      sa.Integer,  sa.ForeignKey("kol_posts.id"), nullable=False),
+        sa.Column("post_action",  sa.String(16), nullable=False),  # buy|sell|bullish|bearish
+        sa.Column("post_conviction", sa.Float, nullable=True),
+        sa.Column("post_at",      sa.DateTime, nullable=False),    # post published_at
+        # On-chain side (A-tier)
+        sa.Column("change_id",    sa.Integer,  sa.ForeignKey("kol_holding_changes.id"), nullable=False),
+        sa.Column("onchain_action", sa.String(16), nullable=False),  # new_position|increased|decreased|closed
+        sa.Column("usd_before",   sa.Float,    nullable=True),
+        sa.Column("usd_after",    sa.Float,    nullable=True),
+        sa.Column("onchain_at",   sa.DateTime, nullable=False),
+        # Classification
+        sa.Column("signal_type",  sa.String(16), nullable=False),  # divergence | alignment
+        sa.Column("direction",    sa.String(8),  nullable=True),   # long | short (net conclusion)
+        sa.Column("days_apart",   sa.Float,    nullable=True),     # abs days between post and onchain event
+        sa.Column("created_at",   sa.DateTime, nullable=False, server_default=sa.func.now()),
+        # Unique: one row per (post, change) pair so re-runs are idempotent
+        sa.UniqueConstraint("post_id", "change_id", name="uq_kol_divergence_pair"),
+    )
+    op.create_index("ix_kol_divergence_handle_ticker", "kol_divergence", ["handle", "ticker"])
+    op.create_index("ix_kol_divergence_signal_type",   "kol_divergence", ["signal_type"])
+    op.create_index("ix_kol_divergence_created_at",    "kol_divergence", ["created_at"])
+
+
+def downgrade() -> None:
+    op.drop_table("kol_divergence")