Enable all TLDs for import and auto-deny spam domains

- Remove .com-only filter from vertices import
- Add shouldAutoDenyDomain() to detect spam patterns (^[0-9]-)
- Apply auto-deny to all domain insert paths (save, saveTx, bulk import)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

domain.go

@@ -25,8 +25,23 @@ type Domain struct {
 	TLD           string    `json:"tld,omitempty"`
 }
 
+// shouldAutoDenyDomain checks if a domain should be auto-denied based on patterns
+func shouldAutoDenyDomain(host string) bool {
+	// Deny domains starting with digit followed by dash (e.g., "0-example.com")
+	if len(host) >= 2 && host[0] >= '0' && host[0] <= '9' && host[1] == '-' {
+		return true
+	}
+	return false
+}
+
 // saveDomain stores a domain in PostgreSQL
 func (c *Crawler) saveDomain(domain *Domain) error {
+	// Auto-deny domains matching spam patterns
+	status := domain.Status
+	if shouldAutoDenyDomain(domain.Host) {
+		status = "denied"
+	}
+
 	_, err := c.db.Exec(`
 		INSERT INTO domains (host, status, discovered_at, last_crawled_at, feeds_found, last_error, tld)
 		VALUES ($1, $2, $3, $4, $5, $6, $7)
@@ -36,18 +51,24 @@ func (c *Crawler) saveDomain(domain *Domain) error {
 			feeds_found = EXCLUDED.feeds_found,
 			last_error = EXCLUDED.last_error,
 			tld = EXCLUDED.tld
-	`, domain.Host, domain.Status, domain.DiscoveredAt, NullableTime(domain.LastCrawledAt),
+	`, domain.Host, status, domain.DiscoveredAt, NullableTime(domain.LastCrawledAt),
 		domain.FeedsFound, NullableString(domain.LastError), domain.TLD)
 	return err
 }
 
 // saveDomainTx stores a domain using a transaction
 func (c *Crawler) saveDomainTx(tx pgx.Tx, domain *Domain) error {
+	// Auto-deny domains matching spam patterns
+	status := domain.Status
+	if shouldAutoDenyDomain(domain.Host) {
+		status = "denied"
+	}
+
 	_, err := tx.Exec(context.Background(), `
 		INSERT INTO domains (host, status, discovered_at, last_crawled_at, feeds_found, last_error, tld)
 		VALUES ($1, $2, $3, $4, $5, $6, $7)
 		ON CONFLICT(host) DO NOTHING
-	`, domain.Host, domain.Status, domain.DiscoveredAt, NullableTime(domain.LastCrawledAt),
+	`, domain.Host, status, domain.DiscoveredAt, NullableTime(domain.LastCrawledAt),
 		domain.FeedsFound, NullableString(domain.LastError), domain.TLD)
 	return err
 }
@@ -242,10 +263,7 @@ func (c *Crawler) ImportDomainsInBackground(filename string) {
 					if reverseHostName != "" {
 						host := normalizeHost(reverseHost(reverseHostName))
 						tld := getTLD(host)
-						// Only import .com domains for now
+						domains = append(domains, domainEntry{host: host, tld: tld})
-						if tld == "com" {
-							domains = append(domains, domainEntry{host: host, tld: tld})
-						}
 					}
 				}
 			}
@@ -262,10 +280,14 @@ func (c *Crawler) ImportDomainsInBackground(filename string) {
 				break
 			}
 
-			// Build rows for copy
+			// Build rows for copy, applying auto-deny for spam patterns
 			rows := make([][]interface{}, len(domains))
 			for i, d := range domains {
-				rows[i] = []interface{}{d.host, "unchecked", now, d.tld}
+				status := "unchecked"
+				if shouldAutoDenyDomain(d.host) {
+					status = "denied"
+				}
+				rows[i] = []interface{}{d.host, status, now, d.tld}
 			}
 
 			// Use CopyFrom for bulk insert
@@ -280,11 +302,15 @@ func (c *Crawler) ImportDomainsInBackground(filename string) {
 			if err != nil {
 				// Fall back to individual inserts with ON CONFLICT
 				for _, d := range domains {
+					status := "unchecked"
+					if shouldAutoDenyDomain(d.host) {
+						status = "denied"
+					}
 					c.db.Exec(`
 						INSERT INTO domains (host, status, discovered_at, tld)
-						VALUES ($1, 'unchecked', $2, $3)
+						VALUES ($1, $2, $3, $4)
 						ON CONFLICT(host) DO NOTHING
-					`, d.host, now, d.tld)
+					`, d.host, status, now, d.tld)
 				}
 				imported = int64(len(domains))
 			}
@@ -361,13 +387,17 @@ func (c *Crawler) parseAndStoreDomains(reader io.Reader, limit int) (imported in
 			break
 		}
 
-		// Insert with ON CONFLICT
+		// Insert with ON CONFLICT, applying auto-deny for spam patterns
 		for _, d := range domains {
+			status := "unchecked"
+			if shouldAutoDenyDomain(d.host) {
+				status = "denied"
+			}
 			result, err := c.db.Exec(`
 				INSERT INTO domains (host, status, discovered_at, tld)
-				VALUES ($1, 'unchecked', $2, $3)
+				VALUES ($1, $2, $3, $4)
 				ON CONFLICT(host) DO NOTHING
-			`, d.host, now, d.tld)
+			`, d.host, status, now, d.tld)
 			if err != nil {
 				skipped++
 			} else if result > 0 {