[ENH]: Metering for indexing_status (#6128)

## Description of changes

As titled,

- Improvements & Bug fixes
    - ...
- New functionality
    - ...

## Test plan

_How are these changes tested?_

- [ ] Tests pass locally with `pytest` for python, `yarn test` for js, `cargo test` for rust

## Migration plan

_Are there any migrations, or any forwards/backwards compatibility changes needed in order to make sure this change deploys reliably?_

## Observability plan

_What is the plan to instrument and monitor this change?_

## Documentation Changes

_Are all docstrings for user-facing APIs updated if required? Do we need to make documentation changes in the_ [_docs section](https://github.com/chroma-core/chroma/tree/main/docs/docs.trychroma.com)?_

Author: tanujnay112

rust/frontend/src/impls/service_based_frontend.rs

@@ -1448,6 +1448,11 @@ impl ServiceBasedFrontend {
             num_indexed_ops as f32 / total_ops as f32
         };
 
+        chroma_metering::with_current(|context| {
+            context.latest_collection_logical_size_bytes(0);
+            context.finish_request(Instant::now());
+        });
+
         Ok(IndexStatusResponse {
             op_indexing_progress,
             num_unindexed_ops,

rust/frontend/src/server.rs

@@ -1822,11 +1822,10 @@ async fn indexing_status(
         format!("collection:{}", collection_id).as_str(),
     ])?;
 
-    // TODO(tanujnay112): Add authorization for indexing status
     server
         .authenticate_and_authorize_collection(
             &headers,
-            AuthzAction::GetCollection,
+            AuthzAction::Count,
             AuthzResource {
                 tenant: Some(tenant.clone()),
                 database: Some(database.clone()),
@@ -1836,10 +1835,30 @@ async fn indexing_status(
         )
         .await?;
 
+    let metering_context_container =
+        chroma_metering::create::<CollectionReadContext>(CollectionReadContext::new(
+            tenant.clone(),
+            database.clone(),
+            collection_id.clone(),
+            ReadAction::Query,
+        ));
+
+    metering_context_container.enter();
+
+    chroma_metering::with_current(|context| {
+        context.start_request(Instant::now());
+    });
+
     let collection_id =
         CollectionUuid::from_str(&collection_id).map_err(|_| ValidationError::CollectionId)?;
 
-    Ok(Json(server.frontend.indexing_status(collection_id).await?))
+    Ok(Json(
+        server
+            .frontend
+            .indexing_status(collection_id)
+            .meter(metering_context_container)
+            .await?,
+    ))
 }
 
 /// Retrieves records from a collection by ID or metadata filter.