[fix](trx-frontend-http): speed up decode history replay

Serve decode history as gzipped CBOR and decode it in the frontend.
Defer map materialization until replay completes to avoid replay-time stutter,
and include the pending longest-QSO style adjustment.

Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-client/trx-frontend/trx-frontend-http/Cargo.toml

@@ -21,6 +21,7 @@ actix-ws = "0.3"
 tokio-stream = { version = "0.1", features = ["sync"] }
 futures-util = "0.3"
 bytes = "1"
+flate2 = { workspace = true }
 rand = "0.8"
 hex = "0.4"
 pickledb = "0.5"