resource_usage_agent: add RocksDB block read count to Top SQL resource dimensions

[jiong-nba]

Enhancement

Add rocksdb_block_read_count field to the resource usage protobuf records, enabling TiKV to report foreground RocksDB block-read deltas through Top SQL / resource metering.

Ref: tikv/tikv#19867

Related Work

kvproto

• resource_usage_agent: add RocksDB block read count pingcap/kvproto#1498

TiKV

• *: extend Top SQL resource dimensions tikv/tikv#19950
• Tracking issue: Extend Top SQL resource dimensions with logical read/write and RocksDB block reads tikv/tikv#19867

[jiong-nba]

/type enhancement

[ti-chi-bot]

@jiong-nba: The label(s) /enhancement cannot be applied, because the repository doesn't have them.

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In response to this:

/type enhancement

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[jiong-nba]

/component observability

[ti-chi-bot]

@jiong-nba: The label(s) /observability cannot be applied, because the repository doesn't have them.

Details

In response to this:

/component observability

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