fix(mcp): harden dashboard dispatch lifecycle

Co-authored-by: naiba/CloudCode <hi+cloudcode@nai.ba>

cmd/dashboard/controller/mcp_ratelimit_agentcompat.go

@@ -0,0 +1,51 @@
+//go:build agentcompat
+
+package controller
+
+import (
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+type agentcompatMCPRateLimitProbeRequest struct {
+}
+
+type agentcompatMCPRateLimitProbeResponse struct {
+	SecondAllowedCount    int `json:"second_allowed_count"`
+	SecondRejectedAtCount int `json:"second_rejected_at_count"`
+	MinuteAllowedCount    int `json:"minute_allowed_count"`
+	MinuteRejectedAtCount int `json:"minute_rejected_at_count"`
+}
+
+func agentcompatMCPRateLimitProbeRoute(context *gin.Context) (agentcompatMCPRateLimitProbeResponse, error) {
+	var request agentcompatMCPRateLimitProbeRequest
+	if err := decodeAgentcompatJSON(context, &request); err != nil {
+		return agentcompatMCPRateLimitProbeResponse{}, err
+	}
+	return runAgentcompatMCPRateLimitProbe(request)
+}
+
+func runAgentcompatMCPRateLimitProbe(request agentcompatMCPRateLimitProbeRequest) (agentcompatMCPRateLimitProbeResponse, error) {
+	response := agentcompatMCPRateLimitProbeResponse{}
+	secondNow := time.Unix(1_700_000_000, 0)
+	secondLimiter := newMCPRateLimiterWithClock(10, 120, func() time.Time { return secondNow })
+	for requestNumber := 1; requestNumber <= 11; requestNumber++ {
+		if secondLimiter.Allow(1) {
+			response.SecondAllowedCount++
+		} else if response.SecondRejectedAtCount == 0 {
+			response.SecondRejectedAtCount = requestNumber
+		}
+	}
+	minuteNow := time.Unix(1_700_000_000, 0)
+	minuteLimiter := newMCPRateLimiterWithClock(10_000, 120, func() time.Time { return minuteNow })
+	for requestNumber := 1; requestNumber <= 121; requestNumber++ {
+		if minuteLimiter.Allow(1) {
+			response.MinuteAllowedCount++
+		} else if response.MinuteRejectedAtCount == 0 {
+			response.MinuteRejectedAtCount = requestNumber
+		}
+		minuteNow = minuteNow.Add(100 * time.Millisecond)
+	}
+	return response, nil
+}