Add checkpoint identity and manifest types

internal/core/workspace/manifest.go

@@ -0,0 +1,82 @@
+package workspace
+
+import "time"
+
+const WorkspaceSchemaVersion = "notarius.workspace.v1"
+
+type StageName string
+
+const (
+	StageSource    StageName = "source"
+	StageChunk     StageName = "chunk"
+	StageExtract   StageName = "extract"
+	StageMerge     StageName = "merge"
+	StageNormalize StageName = "normalize"
+)
+
+type StageStatus string
+
+const (
+	StatusPending                 StageStatus = "pending"
+	StatusRunning                 StageStatus = "running"
+	StatusSucceeded               StageStatus = "succeeded"
+	StatusSucceededWithRejections StageStatus = "succeeded_with_rejections"
+	StatusFailed                  StageStatus = "failed"
+	StatusInvalidated             StageStatus = "invalidated"
+)
+
+type StageManifest struct {
+	WorkspaceSchemaVersion string             `json:"workspace_schema_version"`
+	Stage                  StageName          `json:"stage"`
+	LaneID                 string             `json:"lane_id,omitempty"`
+	ModuleKey              string             `json:"module_key,omitempty"`
+	DependencyFingerprints []Fingerprint      `json:"dependency_fingerprints,omitempty"`
+	Status                 StageStatus        `json:"status"`
+	OutputDigests          []Fingerprint      `json:"output_digests,omitempty"`
+	ValidationStatus       string             `json:"validation_status,omitempty"`
+	Rejections             []RejectionSummary `json:"rejections,omitempty"`
+	StartedAt              *time.Time         `json:"started_at,omitempty"`
+	CompletedAt            *time.Time         `json:"completed_at,omitempty"`
+	Metadata               map[string]string  `json:"metadata,omitempty"`
+}
+
+type RejectionSummary struct {
+	ValidatorName string `json:"validator_name,omitempty"`
+	ReasonCode    string `json:"reason_code,omitempty"`
+	Message       string `json:"message,omitempty"`
+	Count         int    `json:"count,omitempty"`
+}
+
+type SourceManifest struct {
+	StageManifest
+	SourceID string `json:"source_id,omitempty"`
+}
+
+type ChunkManifest struct {
+	StageManifest
+	ChunkCount int `json:"chunk_count,omitempty"`
+}
+
+type ExtractLaneManifest struct {
+	StageManifest
+	ChunkCount  int `json:"chunk_count,omitempty"`
+	OutputCount int `json:"output_count,omitempty"`
+}
+
+type MergeLaneManifest struct {
+	StageManifest
+	InputCount int `json:"input_count,omitempty"`
+}
+
+type NormalizeLaneManifest struct {
+	StageManifest
+	InputCount int `json:"input_count,omitempty"`
+}
+
+func NewStageManifest(stage StageName, status StageStatus) StageManifest {
+	return StageManifest{
+		WorkspaceSchemaVersion: WorkspaceSchemaVersion,
+		Stage:                  stage,
+		Status:                 status,
+	}
+}