feat(foundationdb): complete rewrite, backporting flow code

Author: PierreZ

foundationdb/Cargo.toml

@@ -43,14 +43,16 @@ foundationdb-gen = { version = "0.5.1", path = "../foundationdb-gen", default-fe
 
 [dependencies]
 foundationdb-sys = { version = "0.5.1", path = "../foundationdb-sys", default-features = false }
-futures = "0.3.1"
+futures = "0.3.14"
 memchr = "2.2.1"
 rand = { version = "0.7.2", features = ["default", "small_rng"] }
 static_assertions = "1.1.0"
 uuid = { version = "0.8.1", optional = true }
 num-bigint = { version = "0.3.0", optional = true }
 byteorder = "1.3.2"
 async-trait = "0.1.48"
+async-recursion = "0.3.2"
+parking_lot = "0.11.1"
 
 [dev-dependencies]
 lazy_static = "1.4.0"