test(tools): add unit tests for error handling functions

* Implement tests for error functions like errRequiredField, errInvalidField, and errEntityNotFound.
* Ensure proper metadata is returned for various error scenarios.
* Validate error handling in CRM, Files, and other tools.
* Introduce tests for parsing stored file IDs and UUIDs.
* Enhance coverage for helper functions related to project resolution and session management.

internal/config/config.go

@@ -31,10 +31,11 @@ type ServerConfig struct {
 }
 
 type MCPConfig struct {
-	Path       string `yaml:"path"`
-	ServerName string `yaml:"server_name"`
-	Version    string `yaml:"version"`
-	Transport  string `yaml:"transport"`
+	Path           string        `yaml:"path"`
+	ServerName     string        `yaml:"server_name"`
+	Version        string        `yaml:"version"`
+	Transport      string        `yaml:"transport"`
+	SessionTimeout time.Duration `yaml:"session_timeout"`
 }
 
 type AuthConfig struct {