feat: add bounded workflow decisions and durable result inbox

weave/engine/poll.go

@@ -0,0 +1,54 @@
+package engine
+
+import (
+	"encoding/json"
+
+	"git.yuntuo.hk/k2safe/orbit/weave/definition"
+)
+
+// PollOutcome 仅分类一次成功查询的业务结果，不代表查询请求的Pulse执行状态。
+type PollOutcome string
+
+const (
+	PollPending     PollOutcome = "PENDING"
+	PollSucceeded   PollOutcome = "SUCCEEDED"
+	PollFailed      PollOutcome = "FAILED"
+	PollNeedsReview PollOutcome = "NEEDS_REVIEW"
+)
+
+// ClassifyPoll 解释固定定义中的结果映射；轮次/时限/信号竞态仍由持久化运行器决定。
+func (p *Program) ClassifyPoll(key string, raw json.RawMessage) (PollOutcome, error) {
+	node, ok := p.nodes[key]
+	if !ok || node.Poll == nil {
+		return "", problem(key, "NOT_A_POLL_STEP")
+	}
+	result, err := classifyPoll(*node.Poll, raw)
+	if err != nil {
+		return "", problem(key, "POLL_RESULT_INVALID")
+	}
+	return result, nil
+}
+func classifyPoll(p definition.Poll, raw json.RawMessage) (PollOutcome, error) {
+	if err := definition.ValidateData(p.Task.ResultType, raw); err != nil {
+		return "", err
+	}
+	status, err := resolve(definition.Value{Kind: "REFERENCE", Reference: &definition.Reference{Source: "result", Path: p.StatusPath}}, definition.Type{Kind: "STRING"}, values{"result": raw})
+	if err != nil {
+		return "", err
+	}
+	var value string
+	if err := json.Unmarshal(status, &value); err != nil {
+		return "", err
+	}
+	for _, group := range []struct {
+		values  []string
+		outcome PollOutcome
+	}{{p.Pending, PollPending}, {p.Succeeded, PollSucceeded}, {p.Failed, PollFailed}, {p.Review, PollNeedsReview}} {
+		for _, candidate := range group.values {
+			if value == candidate {
+				return group.outcome, nil
+			}
+		}
+	}
+	return "", problem("", "UNMAPPED_POLL_RESULT")
+}