Revise domain status flow: skip uses takedown, add drop for permanent deletion

- Import default changed from 'hold' to 'pass' (auto-crawl)
- Skip now uses PDS takedown (hides posts but preserves data)
- Added 'drop' status for permanent deletion (requires skip first)
- Added TakedownAccount/RestoreAccount PDS functions
- Un-skip restores PDS accounts and reactivates feeds
- Dashboard shows 'drop' button only for skipped domains

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

domain.go

@@ -230,7 +230,7 @@ func (c *Crawler) ImportTestDomains(domains []string) {
 	for _, host := range domains {
 		_, err := c.db.Exec(`
 			INSERT INTO domains (host, status, discovered_at, tld)
-			VALUES ($1, 'hold', $2, $3)
+			VALUES ($1, 'pass', $2, $3)
 			ON CONFLICT(host) DO NOTHING
 		`, host, now, getTLD(host))
 		if err != nil {
@@ -241,7 +241,7 @@ func (c *Crawler) ImportTestDomains(domains []string) {
 	}
 }
 
-// ImportDomainsFromFile reads a vertices file and stores new domains as "hold"
+// ImportDomainsFromFile reads a vertices file and stores new domains as "pass"
 func (c *Crawler) ImportDomainsFromFile(filename string, limit int) (imported int, skipped int, err error) {
 	file, err := os.Open(filename)
 	if err != nil {
@@ -328,7 +328,7 @@ func (c *Crawler) ImportDomainsInBackground(filename string) {
 			// Build rows for copy, applying auto-skip for spam patterns
 			rows := make([][]interface{}, len(domains))
 			for i, d := range domains {
-				status := "hold"
+				status := "pass"
 				if shouldAutoSkipDomain(d.host) {
 					status = "skip"
 				}
@@ -347,7 +347,7 @@ func (c *Crawler) ImportDomainsInBackground(filename string) {
 			if err != nil {
 				// Fall back to individual inserts with ON CONFLICT
 				for _, d := range domains {
-					status := "hold"
+					status := "pass"
 					if shouldAutoSkipDomain(d.host) {
 						status = "skip"
 					}
@@ -436,7 +436,7 @@ func (c *Crawler) parseAndStoreDomains(reader io.Reader, limit int) (imported in
 
 		// Insert with ON CONFLICT, applying auto-skip for spam patterns
 		for _, d := range domains {
-			status := "hold"
+			status := "pass"
 			if shouldAutoSkipDomain(d.host) {
 				status = "skip"
 			}