[indexer-alt] 5X default chunk row size (#20332)

## Description 

Increase batch size by ~5X

## Test plan 

How did you test the new or updated feature?

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## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

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that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API:

crates/sui-indexer-alt/src/pipeline/concurrent/mod.rs

@@ -57,10 +57,10 @@ pub trait Handler: Processor {
 
     /// If there are more than this many rows pending, the committer will only commit this many in
     /// one operation.
-    const MAX_CHUNK_ROWS: usize = 200;
+    const MAX_CHUNK_ROWS: usize = 1000;
 
     /// If there are more than this many rows pending, the committer applies backpressure.
-    const MAX_PENDING_ROWS: usize = 1000;
+    const MAX_PENDING_ROWS: usize = 5000;
 
     /// Provides a way for individual pipeline to override the write_concurrency parameter
     /// from the PipelineConfig. This is used to determine the number of concurrent tasks