feat: add secure agent enrollment

backend/app/identity.py

@@ -699,8 +699,10 @@ def required_page_permission(path: str) -> str:
 
 def machine_agent_request(path: str) -> bool:
     exact = {
+        "/api/agent/enroll",
         "/api/agent/checkin",
         "/api/agent/config",
+        "/api/agent/known-miners",
         "/api/agent/miner-snapshots",
         "/api/agent/pool-snapshots",
         "/api/agent/commands/pending",
@@ -779,6 +781,8 @@ def required_api_permission(method: str, path: str) -> str | None:
         return "components.create" if method == "POST" else "components.read"
     if path == "/api/agent-zones":
         return "agents.view" if method == "GET" else "agents.manage"
+    if path == "/api/agent-enrollments":
+        return "agents.view" if method == "GET" else "agents.manage"
     if repair_parts_request(path):
         return "repairs.read" if method == "GET" else "repairs.parts.manage"
     if path.startswith("/api/admin/"):