Improve compliance checker UX + add search logging

- Loading message: shows estimated time (30-90 seconds) + rotating status
  updates (RMD, CPNI, USAC, BDC, STIR/SHAKEN, compiling report)
- Timeout increased to 90s (was 60s)
- Error messages: "try again in a few minutes" (not "moments" or "check internet")
- New compliance_check_log table: logs every FCC lookup with FRN, entity,
  IP, user agent, referrer, issue count, severity, response time
- Enables conversion funnel analysis and follow-up

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/migrations/077_compliance_check_log.sql

@@ -0,0 +1,26 @@
+-- 077: Log every FCC compliance check for analytics and follow-up.
+-- Tracks who runs checks, what results they see, and whether they convert.
+
+CREATE TABLE IF NOT EXISTS compliance_check_log (
+    id              SERIAL PRIMARY KEY,
+    frn             TEXT NOT NULL,
+    entity_name     TEXT,
+    ip_address      TEXT,
+    user_agent      TEXT,
+    referrer        TEXT,
+    -- Results summary
+    total_checks    INTEGER DEFAULT 0,
+    issues_found    INTEGER DEFAULT 0,
+    severity        TEXT,          -- critical, major, minor, clean
+    check_slugs     TEXT[],        -- which services were flagged
+    -- Timing
+    response_ms     INTEGER,       -- how long the API call took
+    -- Conversion tracking
+    clicked_order   BOOLEAN DEFAULT FALSE,
+    order_number    TEXT,          -- if they eventually ordered
+    -- Metadata
+    created_at      TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_check_log_frn ON compliance_check_log(frn);
+CREATE INDEX IF NOT EXISTS idx_check_log_created ON compliance_check_log(created_at);