feat: add provisioner job hang detector (#7927)

coderd/database/lock.go

@@ -0,0 +1,19 @@
+package database
+
+import "hash/fnv"
+
+// Well-known lock IDs for lock functions in the database. These should not
+// change. If locks are deprecated, they should be kept in this list to avoid
+// reusing the same ID.
+const (
+	// Keep the unused iota here so we don't need + 1 every time
+	lockIDUnused = iota
+	LockIDDeploymentSetup
+)
+
+// GenLockID generates a unique and consistent lock ID from a given string.
+func GenLockID(name string) int64 {
+	hash := fnv.New64()
+	_, _ = hash.Write([]byte(name))
+	return int64(hash.Sum64())
+}