Add bounded exact-byte document extraction protocol and transport

crates/searchi-core/Cargo.toml

@@ -8,6 +8,7 @@ license.workspace = true
 searchi-media = { path = "../searchi-media" }
 anyhow.workspace = true
 serde.workspace = true
+serde_json.workspace = true
 sha2 = "0.10"
 rusqlite = { version = "0.32", features = ["bundled"] }
 walkdir = "2"