fix: ensure channel size non zero

[jiacai2050]

Rationale

When channel capacity < read_parallelism, we will pass 0 to channel, which will cause panic

2023-12-05 20:31:32.974 ERRO [components/panic_ext/src/lib.rs:54] thread 'ceres-read' panicked 'mpsc bounded channel requires buffer > 0' at "analytic_engine/src/sst/parquet/async_reader.rs:736"

Detailed Changes

• Ensure channel size non zero

Test Plan

No need.

[Rachelint]

LGTM