fix(ai-security-guard): 移除Suggestion=block的兜底逻辑，改为基于阈值判断 || fix(ai-security-guard): Remove the cover-up logic of Suggestion=block and change it to based on threshold judgment (#3731)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

plugins/wasm-go/extensions/ai-security-guard/config/config.go

@@ -807,11 +807,6 @@ func evaluateRiskMultiModal(data Data, config AISecurityConfig, consumer string)
 		}
 	}
 
-	// 3. Data.Suggestion=block fallback
-	if data.Suggestion == "block" {
-		return RiskBlock
-	}
-
 	if hasMask {
 		return RiskMask
 	}
@@ -821,9 +816,6 @@ func evaluateRiskMultiModal(data Data, config AISecurityConfig, consumer string)
 // detailTriggersBlock returns whether this single detail should trigger blocking,
 // given the resolved dimension action and threshold evaluation result.
 func detailTriggersBlock(detail Detail, dimAction string, exceeds bool) bool {
-	if detail.Suggestion == "block" {
-		return true
-	}
 	if dimAction == "block" {
 		return exceeds
 	}