feat: add overall timeout parameter to remote client (#2550)

## Summary
- Adds an overall `timeout` parameter to `TimeoutConfig` that limits the
total time for the entire request
- Can be set via config or `LANCE_CLIENT_TIMEOUT` environment variable
- Exposed in Python and Node.js bindings
- Includes comprehensive tests

## Test plan
- [x] Unit tests for Rust TimeoutConfig
- [x] Integration tests for Python bindings  
- [x] Integration tests for Node.js bindings
- [x] All existing tests pass

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <noreply@anthropic.com>

nodejs/__test__/remote.test.ts

@@ -42,6 +42,28 @@ describe("remote connection", () => {
     });
   });
 
+  it("should accept overall timeout configuration", async () => {
+    await connect("db://test", {
+      apiKey: "fake",
+      clientConfig: {
+        timeoutConfig: { timeout: 30 },
+      },
+    });
+
+    // Test with all timeout parameters
+    await connect("db://test", {
+      apiKey: "fake",
+      clientConfig: {
+        timeoutConfig: {
+          timeout: 60,
+          connectTimeout: 10,
+          readTimeout: 20,
+          poolIdleTimeout: 300,
+        },
+      },
+    });
+  });
+
   it("should pass down apiKey and userAgent", async () => {
     await withMockDatabase(
       (req, res) => {

nodejs/src/remote.rs

@@ -9,6 +9,12 @@ use napi_derive::*;
 #[napi(object)]
 #[derive(Debug)]
 pub struct TimeoutConfig {
+    /// The overall timeout for the entire request in seconds. This includes
+    /// connection, send, and read time. If the entire request doesn't complete
+    /// within this time, it will fail. Default is None (no overall timeout).
+    /// This can also be set via the environment variable `LANCE_CLIENT_TIMEOUT`,
+    /// as an integer number of seconds.
+    pub timeout: Option<f64>,
     /// The timeout for establishing a connection in seconds. Default is 120
     /// seconds (2 minutes). This can also be set via the environment variable
     /// `LANCE_CLIENT_CONNECT_TIMEOUT`, as an integer number of seconds.
@@ -75,6 +81,7 @@ pub struct ClientConfig {
 impl From<TimeoutConfig> for lancedb::remote::TimeoutConfig {
     fn from(config: TimeoutConfig) -> Self {
         Self {
+            timeout: config.timeout.map(std::time::Duration::from_secs_f64),
             connect_timeout: config
                 .connect_timeout
                 .map(std::time::Duration::from_secs_f64),