pagebench: add a 'basebackup' benchmark

Cargo.lock

@@ -2106,6 +2106,20 @@ dependencies = [
  "hashbrown 0.13.2",
 ]
 
+[[package]]
+name = "hdrhistogram"
+version = "7.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "765c9198f173dd59ce26ff9f95ef0aafd0a0fe01fb9d72841bc5066a4c06511d"
+dependencies = [
+ "base64 0.21.1",
+ "byteorder",
+ "crossbeam-channel",
+ "flate2",
+ "nom",
+ "num-traits",
+]
+
 [[package]]
 name = "heapless"
 version = "0.8.0"
@@ -3062,7 +3076,16 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "clap",
+ "futures",
+ "hdrhistogram",
+ "humantime",
+ "humantime-serde",
  "pageserver",
+ "rand 0.8.5",
+ "serde",
+ "serde_json",
+ "tokio",
+ "tracing",
  "utils",
 ]