[BLD] Auto rebuild protos if they change in rust (chroma-core#1902)

## Description of changes

*Summarize the changes made by this PR.*
 - Improvements & Bug fixes
	 - Auto rebuild protos if they change in rust
 - New functionality
	 - None

## Test plan
*How are these changes tested?*
- [x] Tests pass locally with `pytest` for python, `yarn test` for js,
`cargo test` for rust

## Documentation Changes
None

rust/worker/build.rs

@@ -1,13 +1,15 @@
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Compile the protobuf files in the chromadb proto directory.
-    tonic_build::configure().compile(
-        &[
-            "../../idl/chromadb/proto/chroma.proto",
-            "../../idl/chromadb/proto/coordinator.proto",
-            "../../idl/chromadb/proto/logservice.proto",
-        ],
-        &["../../idl/"],
-    )?;
+    tonic_build::configure()
+        .emit_rerun_if_changed(true)
+        .compile(
+            &[
+                "../../idl/chromadb/proto/chroma.proto",
+                "../../idl/chromadb/proto/coordinator.proto",
+                "../../idl/chromadb/proto/logservice.proto",
+            ],
+            &["../../idl/"],
+        )?;
 
     // Compile the hnswlib bindings.
     cc::Build::new()