refactor: rename SolaceScanScout to Solace and update related configurations

- Updated branding from "SolaceScanScout" to "Solace" across various files including deployment scripts, API responses, and documentation.
- Changed default base URL for Playwright tests and updated security headers to reflect the new branding.
- Enhanced README and API documentation to include new authentication endpoints and product access details.

This refactor aligns the project branding and improves clarity in the API documentation.

backend/auth/wallet_auth.go

@@ -141,7 +141,7 @@ func (w *WalletAuth) AuthenticateWallet(ctx context.Context, req *WalletAuthRequ
 	}
 
 	// Verify signature
-	message := fmt.Sprintf("Sign this message to authenticate with SolaceScanScout Explorer.\n\nNonce: %s", req.Nonce)
+	message := fmt.Sprintf("Sign this message to authenticate with SolaceScan.\n\nNonce: %s", req.Nonce)
 	messageHash := accounts.TextHash([]byte(message))
 
 	sigBytes, err := decodeWalletSignature(req.Signature)