feat: complete release readiness work

- consolidate API ownership and remove dead vendor code

- add Stripe billing, learning paths, and public CV hardening

- add migration, recovery, security, audit, and browser gates

JobTrackerApi/Models/RuleSettings.cs

@@ -0,0 +1,21 @@
+namespace JobTrackerApi.Models
+{
+    // Single-row table to store workflow automation thresholds.
+    public class RuleSettings
+    {
+        public int Id { get; set; } = 1;
+
+        // Applied / no response yet
+        public int AppliedFollowUpDays { get; set; } = 14;
+        public int AppliedGhostDays { get; set; } = 30;
+
+        // Offer / accepted waiting on next step
+        public int OfferFollowUpDays { get; set; } = 7;
+        public int OfferGhostDays { get; set; } = 14;
+
+        // Rejected but you requested feedback
+        public int FeedbackFollowUpDays { get; set; } = 7;
+        public int FeedbackGhostDays { get; set; } = 14;
+    }
+}
+