Fix failed ACME block the queue

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/coredata/migrations/20251014T120000Z.sql

@@ -0,0 +1,8 @@
+-- Add retry tracking fields for SSL certificate provisioning
+ALTER TABLE custom_domains ADD COLUMN ssl_retry_count INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE custom_domains ADD COLUMN ssl_last_attempt_at TIMESTAMP;
+
+-- Add index to efficiently find stale provisioning attempts
+CREATE INDEX idx_custom_domains_ssl_last_attempt
+    ON custom_domains(ssl_last_attempt_at, ssl_status)
+    WHERE ssl_status IN ('PENDING', 'PROVISIONING', 'RENEWING');