Add authentication support and enhance protocol handling

- **protocol/socketapi/challenge.go**:
  - Removed unused `GetListener` function and its associated logic.

- **protocol/socketapi/handleEvent.go**:
  - Refactored `env.Id` references to `env.E.Id` to standardize access to event identifiers.

- **app/realy/server-impl.go**:
  - Added `AuthRequired` method to expose server-level authentication configuration.

- **app/realy/handleRelayinfo.go**:
  - Included `Authentication` in supported protocols.
  - Updated relay information to expose `AuthRequired` status in `Limitation`.

- **encoders/envelopes/authenvelope/authenvelope.go**:
  - Introduced `Id` method for `Response` type.

- **app/realy/server-publish.go**:
  - Refined event saving logic by replacing `chk.E` with a direct `err` check.

- **app/realy/server.go**:
  - Added `authRequired` field in `Server` struct and integrated it into relevant methods.

- **protocol/socketapi/socketapi.go**:
  - Introduced authentication handling in WebSocket listeners if `AuthRequired` is enabled.

- **protocol/socketapi/handleAuth.go**:
  - Implemented authentication response validation against challenges and server URLs.
  - Supported logging of successes and failures.

- **app/config/config.go**:
  - Added `AuthRequired` flag to configuration structure and environment variables.

- **encoders/envelopes/eventenvelope/eventenvelope.go**:
  - Added `Id` method for `Submission` and `Result` types.

- **interfaces/server/server.go**:
  - Added `AuthRequired` and `ServiceURL` methods to the interface.

- **protocol/ws/listener.go**:
  - Added `authRequested` field and methods to track authentication requests.

- **protocol/socketapi/ok.go**:
  - Introduced `Ok` utility functions for standard responses indicating reasons and types of errors.

- **app/realy/auth.go**:
  - Added `ServiceURL` method to determine the relay's URL for authentication responses.

- **encoders/reason/reason.go**:
  - Defined reusable reason templates for responses such as `auth-required` and `error`.

- **protocol/socketapi/ws.go**:
  - Adjusted `NewListener` to handle `authRequired` flag and conditionally generate challenges.

main.go

@@ -59,11 +59,12 @@ func main() {
 	go app.MonitorResources(c)
 	var server *realy.Server
 	serverParams := &realy.ServerParams{
-		Ctx:      c,
-		Cancel:   cancel,
-		Rl:       r,
-		DbPath:   cfg.DataDir,
-		MaxLimit: 512, // Default max limit for events
+		Ctx:          c,
+		Cancel:       cancel,
+		Rl:           r,
+		DbPath:       cfg.DataDir,
+		MaxLimit:     512, // Default max limit for events
+		AuthRequired: cfg.AuthRequired,
 	}
 	var opts []options.O
 	if server, err = realy.NewServer(serverParams, opts...); chk.E(err) {