add diagnostic endpoint

server/models/diagnostics.go

@@ -0,0 +1,30 @@
+package models
+
+// DailyCreationMissingByVcenter captures missing CreationTime counts per vCenter.
+type DailyCreationMissingByVcenter struct {
+	Vcenter      string `json:"vcenter"`
+	MissingCount int64  `json:"missing_count"`
+}
+
+// DailyCreationMissingSample is a sample daily summary row missing CreationTime.
+type DailyCreationMissingSample struct {
+	Vcenter        string  `json:"vcenter"`
+	VmId           string  `json:"vm_id,omitempty"`
+	VmUuid         string  `json:"vm_uuid,omitempty"`
+	Name           string  `json:"name,omitempty"`
+	SamplesPresent int64   `json:"samples_present"`
+	AvgIsPresent   float64 `json:"avg_is_present"`
+	SnapshotTime   int64   `json:"snapshot_time"`
+}
+
+// DailyCreationDiagnosticsResponse describes missing CreationTime diagnostics for a daily summary table.
+type DailyCreationDiagnosticsResponse struct {
+	Status               string                         `json:"status"`
+	Date                 string                         `json:"date"`
+	Table                string                         `json:"table"`
+	TotalRows            int64                          `json:"total_rows"`
+	MissingCreationCount int64                          `json:"missing_creation_count"`
+	MissingCreationPct   float64                        `json:"missing_creation_pct"`
+	MissingByVcenter     []DailyCreationMissingByVcenter `json:"missing_by_vcenter"`
+	Samples              []DailyCreationMissingSample    `json:"samples"`
+}