chore: update schema URL to v0.57.0

Update MCP Gateway JSON schema validation URL from v0.55.0 to v0.57.0
to pin to the latest stable release of github/gh-aw.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: github-actions[bot]

internal/config/rules/rules.go

@@ -12,7 +12,7 @@ var log = logger.New("config:rules")
 // Documentation URL constants
 const (
 	ConfigSpecURL = "https://github.com/github/gh-aw/blob/main/docs/src/content/docs/reference/mcp-gateway.md"
-	SchemaURL     = "https://raw.githubusercontent.com/github/gh-aw/v0.55.0/docs/public/schemas/mcp-gateway-config.schema.json"
+	SchemaURL     = "https://raw.githubusercontent.com/github/gh-aw/v0.57.0/docs/public/schemas/mcp-gateway-config.schema.json"
 )
 
 // ValidationError represents a configuration validation error with context.

internal/config/validation_schema.go

@@ -41,7 +41,7 @@ var (
 	// Current schema version: v0.50.7
 	//
 	// Alternative: Embed the schema using go:embed directive for zero network dependency.
-	schemaURL = "https://raw.githubusercontent.com/github/gh-aw/v0.55.0/docs/public/schemas/mcp-gateway-config.schema.json"
+	schemaURL = "https://raw.githubusercontent.com/github/gh-aw/v0.57.0/docs/public/schemas/mcp-gateway-config.schema.json"
 
 	// Schema caching to avoid recompiling the JSON schema on every validation
 	// This improves performance by compiling the schema once and reusing it

internal/config/validation_schema_test.go

@@ -556,7 +556,7 @@ func TestEnhancedErrorMessages(t *testing.T) {
 				"Location:",
 				"Error:",
 				"Details:",
-				"https://raw.githubusercontent.com/github/gh-aw/v0.55.0/docs/public/schemas/mcp-gateway-config.schema.json",
+				"https://raw.githubusercontent.com/github/gh-aw/v0.57.0/docs/public/schemas/mcp-gateway-config.schema.json",
 			},
 		},
 		{