Harden lease lifecycle durability

internal/buildinfo/buildinfo.go

@@ -0,0 +1,19 @@
+// Package buildinfo exposes the provenance injected into Orchestra binaries.
+// Build systems should set Revision, Time, and Dirty with -ldflags. Keeping
+// the defaults explicit makes development binaries honest rather than
+// pretending to be a deployable revision.
+package buildinfo
+
+var (
+	Revision = "devel"
+	Time     = "unknown"
+	Dirty    = "unknown"
+)
+
+type Info struct {
+	Revision string `json:"revision"`
+	Time     string `json:"time"`
+	Dirty    string `json:"dirty"`
+}
+
+func Current() Info { return Info{Revision: Revision, Time: Time, Dirty: Dirty} }