tendermint-proxy: 🎈 hoist TendermintProxy to lib.rs

there are only two files in this library. rather than reëxporting the
type in the `lib.rs`, just define it there and import it where we use
it.

this puts the important, core type provided by the library right at the
top of the reader's entrypoint.

crates/util/tendermint-proxy/src/lib.rs

@@ -9,4 +9,20 @@
 //! [proxy-proto]: https://buf.build/penumbra-zone/penumbra/docs/main:penumbra.util.tendermint_proxy.v1
 
 mod tendermint_proxy;
-pub use tendermint_proxy::TendermintProxy;
+
+/// Implements service traits for Tonic gRPC services.
+///
+/// The fields of this struct are the configuration and data
+/// necessary to the gRPC services.
+#[derive(Clone, Debug)]
+pub struct TendermintProxy {
+    /// Address of upstream Tendermint server to proxy requests to.
+    tendermint_url: url::Url,
+}
+
+impl TendermintProxy {
+    /// Returns a new [`TendermintProxy`].
+    pub fn new(tendermint_url: url::Url) -> Self {
+        Self { tendermint_url }
+    }
+}

crates/util/tendermint-proxy/src/tendermint_proxy.rs

@@ -1,34 +1,22 @@
+use crate::TendermintProxy;
 use chrono::DateTime;
-use penumbra_proto::{self as proto, DomainType, Message};
-use penumbra_transaction::Transaction;
-use proto::util::tendermint_proxy::v1::{
-    tendermint_proxy_service_server::TendermintProxyService, AbciQueryRequest, AbciQueryResponse,
-    BroadcastTxAsyncRequest, BroadcastTxAsyncResponse, BroadcastTxSyncRequest,
-    BroadcastTxSyncResponse, GetBlockByHeightRequest, GetBlockByHeightResponse, GetStatusRequest,
-    GetStatusResponse, GetTxRequest, GetTxResponse, SyncInfo, Tag, TxResult,
+use penumbra_proto::{
+    self as proto,
+    util::tendermint_proxy::v1::{
+        tendermint_proxy_service_server::TendermintProxyService, AbciQueryRequest,
+        AbciQueryResponse, BroadcastTxAsyncRequest, BroadcastTxAsyncResponse,
+        BroadcastTxSyncRequest, BroadcastTxSyncResponse, GetBlockByHeightRequest,
+        GetBlockByHeightResponse, GetStatusRequest, GetStatusResponse, GetTxRequest, GetTxResponse,
+        SyncInfo, Tag, TxResult,
+    },
+    DomainType, Message,
 };
+use penumbra_transaction::Transaction;
 use std::ops::Deref;
 use tendermint::{abci::Code, block::Height};
 use tendermint_rpc::{Client, HttpClient};
 use tonic::Status;
 
-/// Implements service traits for Tonic gRPC services.
-///
-/// The fields of this struct are the configuration and data
-/// necessary to the gRPC services.
-#[derive(Clone, Debug)]
-pub struct TendermintProxy {
-    /// Address of upstream Tendermint server to proxy requests to.
-    tendermint_url: url::Url,
-}
-
-impl TendermintProxy {
-    /// Returns a new [`TendermintProxy`].
-    pub fn new(tendermint_url: url::Url) -> Self {
-        Self { tendermint_url }
-    }
-}
-
 #[tonic::async_trait]
 impl TendermintProxyService for TendermintProxy {
     // Note: the conversions that take place in here could be moved to