fix(mcp): 升级 norma v0.3.4，MCP 工具输出增加截断与落盘

MCP 工具之前无输出大小限制，现在统一走 tool.Capture：
超过 30000 字符时落盘到 cmd-output/ 并返回 head + 文件指针。

go.mod

@@ -3,16 +3,16 @@ module github.com/Autumn-27/artex
 go 1.26.3
 
 require (
-	github.com/Autumn-27/norma v0.3.3
+	github.com/Autumn-27/norma v0.3.4
 	github.com/golang-jwt/jwt/v5 v5.3.1
 	github.com/jackc/pgx/v5 v5.10.0
 	github.com/klauspost/compress v1.18.6
 	github.com/lqqyt2423/go-mitmproxy v1.9.2
 	github.com/miekg/dns v1.1.72
 	github.com/projectdiscovery/dnsx v1.2.3
-	golang.org/x/crypto v0.54.0
-	golang.org/x/net v0.56.0
-	golang.org/x/text v0.40.0
+	golang.org/x/crypto v0.55.0
+	golang.org/x/net v0.58.0
+	golang.org/x/text v0.41.0
 	modernc.org/sqlite v1.52.0
 )
 
@@ -54,7 +54,7 @@ require (
 	golang.org/x/mod v0.40.0 // indirect
 	golang.org/x/sync v0.22.0 // indirect
 	golang.org/x/sys v0.47.0 // indirect
-	golang.org/x/tools v0.47.0 // indirect
+	golang.org/x/tools v0.49.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	modernc.org/libc v1.72.3 // indirect
 	modernc.org/mathutil v1.7.1 // indirect