Disable proxy pool by default; add managed proxy lifecycle and Turnstile fixes.

Keep proxy_pool_enabled/managed off for direct registration, while shipping
SSO OAuth CPA export, visible Turnstile click handling, and proxy harvest tooling.

proxy_alive.json

@@ -0,0 +1,28 @@
+{
+  "version": 1,
+  "proxies": {},
+  "sources": {
+    "proxyscrape_http": {
+      "enabled": true,
+      "last_ok": 1783869240.43135,
+      "last_run": 1783869253.1493964,
+      "fail_streak": 1,
+      "ok_runs": 1,
+      "last_harvested": 40,
+      "last_kept": 0,
+      "last_fail_reason": "harvested but 0 passed accounts.x.ai",
+      "fail_runs": 1
+    },
+    "monosans_http": {
+      "enabled": true,
+      "last_ok": 1783869241.4878805,
+      "last_run": 1783869253.15142,
+      "fail_streak": 1,
+      "ok_runs": 1,
+      "last_harvested": 40,
+      "last_kept": 0,
+      "last_fail_reason": "harvested but 0 passed accounts.x.ai",
+      "fail_runs": 1
+    }
+  }
+}