feat(macro): Macro Vibes — 8-indicator daily snapshot + composite score

New backend pipeline: 8 free public macro signals fetched in parallel,
upserted once per calendar day, served via /api/macro/{snapshot,history}.

  - AHR999 (computed from Binance 200d klines)
  - Altcoin Season Index (CoinGecko top-50 30d)
  - Fear & Greed (alternative.me)
  - BTC dominance, ETH/BTC ratio
  - Stablecoin supply (DeFiLlama)
  - Spot BTC ETF net flow (Farside)
  - BTC perp open interest (Binance fapi)

Each fetcher is independently @_none_on_fail decorated so one outage
can't take down the snapshot; scoring renormalises across whichever
indicators returned a value. Daily cron at 03:00 UTC; on startup a
fire-and-forget bootstrap fills today's row if missing.

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

scripts/verify.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$ROOT_DIR"
+
+echo "[verify] Running backend tests"
+PYTHONPATH=. venv/bin/pytest tests -q
+
+if [[ -n "${BASE_URL:-}" ]]; then
+  echo "[verify] Running launch smoke against ${BASE_URL}"
+  PYTHONPATH=. venv/bin/python scripts/launch_smoke.py --base "$BASE_URL"
+else
+  echo "[verify] Skipping launch smoke (set BASE_URL to enable it)"
+fi