feat: SafeLine CE 9.3.9 with pro features

- Remove telemetry: disabled all phone-home (installation notify, false positives, behavior tracking, upgrade tips)
- Version branding: removed 'ce-' prefix, product name changed to '长亭雷池 WAF'
- Detection engine enhancement: strict preset enables all 17 modules with aggressive configs
- Multi-user RBAC: admin/operator/viewer roles with password + TOTP 2FA
- Rate limiting: nginx limit_req per website (RPS, burst, action)
- JS Challenge: browser fingerprint verification page with cookie-based bypass
- Security fixes: removed InsecureSkipVerify, hardcoded credentials, NO_AUTH backdoor

mcp_server/internal/tools/example.go

@@ -0,0 +1,46 @@
+package tools
+
+import (
+	"context"
+
+	"github.com/chaitin/SafeLine/mcp_server/pkg/errors"
+	"github.com/chaitin/SafeLine/mcp_server/pkg/logger"
+)
+
+type CalculateSum struct{}
+
+func (t *CalculateSum) Name() string {
+	return "calculate_sum"
+}
+
+func (t *CalculateSum) Description() string {
+	return "Add two numbers together"
+}
+
+type MyToolInput struct {
+	A int `json:"a" desc:"number a" required:"true"`
+	B int `json:"b" desc:"number b" required:"true"`
+}
+
+type MyToolOutput struct {
+	C int `json:"c"`
+}
+
+func (t *CalculateSum) Validate(params MyToolInput) error {
+	return nil
+}
+
+func (t *CalculateSum) Execute(ctx context.Context, params MyToolInput) (MyToolOutput, error) {
+	logger.With("a", params.A).
+		With("b", params.B).
+		Debug("Executing calculation")
+
+	result := MyToolOutput{
+		C: params.A + params.B,
+	}
+
+	logger.With("result", result.C).
+		Debug("Calculation completed")
+
+	return result, errors.New("test error")
+}