Enhance server configuration for large file uploads and improve token handling. Increase request body size limit in the server to 20 GB, update registration token expiration logic to support infinite expiration, and adjust database schema to accommodate larger file sizes. Add detailed logging for file upload processes and error handling improvements.

internal/api/runners.go

@@ -70,6 +70,9 @@ func (s *Server) runnerAuthMiddleware(next http.HandlerFunc) http.HandlerFunc {
 }
 
 // handleRegisterRunner registers a new runner
+// Note: Token expiration only affects whether the token can be used for registration.
+// Once a runner is registered, it receives its own runner_secret and manager_secret
+// and operates independently. The token expiration does not affect registered runners.
 func (s *Server) handleRegisterRunner(w http.ResponseWriter, r *http.Request) {
 	var req struct {
 		types.RegisterRunnerRequest
@@ -90,7 +93,7 @@ func (s *Server) handleRegisterRunner(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Validate registration token
+	// Validate registration token (expiration only affects token usability, not registered runners)
 	result, err := s.secrets.ValidateRegistrationTokenDetailed(req.RegistrationToken)
 	if err != nil {
 		s.respondError(w, http.StatusInternalServerError, fmt.Sprintf("Failed to validate token: %v", err))
@@ -119,7 +122,7 @@ func (s *Server) handleRegisterRunner(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Generate runner secret
+	// Generate runner secret (runner will use this for all future authentication, independent of token)
 	runnerSecret, err := s.secrets.GenerateRunnerSecret()
 	if err != nil {
 		s.respondError(w, http.StatusInternalServerError, "Failed to generate runner secret")
@@ -347,7 +350,7 @@ func (s *Server) handleUploadFileFromRunner(w http.ResponseWriter, r *http.Reque
 		return
 	}
 
-	err = r.ParseMultipartForm(100 << 20) // 100 MB
+	err = r.ParseMultipartForm(50 << 30) // 50 GB (for large output files)
 	if err != nil {
 		s.respondError(w, http.StatusBadRequest, "Failed to parse form")
 		return