WIP: Claude Code progress on #15

Automated salvage commit — agent session ended (exit 124).
Work in progress, may need continuation.

lib/db/migrations/0009_zaps.sql

@@ -0,0 +1,13 @@
+-- Migration: Zap Timmy from the Workshop (#15)
+-- Stores Lightning zap invoices and records when they are paid.
+
+CREATE TABLE IF NOT EXISTS zaps (
+  id            TEXT PRIMARY KEY,
+  payment_hash  TEXT NOT NULL UNIQUE,
+  payment_request TEXT NOT NULL,
+  amount_sats   INTEGER NOT NULL,
+  message       TEXT,
+  paid          BOOLEAN NOT NULL DEFAULT FALSE,
+  created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  paid_at       TIMESTAMPTZ
+);