Add invocation backfill tool

Author: bduffany

enterprise/tools/invocation_backfill/BUILD

@@ -0,0 +1,32 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+go_library(
+    name = "invocation_backfill_lib",
+    srcs = ["invocation_backfill.go"],
+    importpath = "github.com/buildbuddy-io/buildbuddy/enterprise/tools/invocation_backfill",
+    visibility = ["//visibility:private"],
+    deps = [
+        "//server/config",
+        "//server/real_environment",
+        "//server/tables",
+        "//server/util/clickhouse",
+        "//server/util/clickhouse/schema",
+        "//server/util/db",
+        "//server/util/flag",
+        "//server/util/flagutil",
+        "//server/util/healthcheck",
+        "//server/util/lib/set",
+        "//server/util/log",
+        "@com_github_google_uuid//:uuid",
+        "@org_golang_x_sync//errgroup",
+        "@org_golang_x_time//rate",
+    ],
+)
+
+go_binary(
+    name = "invocation_backfill",
+    embed = [":invocation_backfill_lib"],
+    visibility = ["//visibility:public"],
+)
+
+package(default_visibility = ["//enterprise:__subpackages__"])