feat: improve scan IO profile metrics

[BohuTANG]

I hereby agree to the terms of the CLA available at: https://docs.databend.com/dev/policies/cla/

Summary

• add dedicated profile counters for remote/local/memory scan bytes so EXPLAIN ANALYZE can report realistic IO splits
• surface percentages for each scan counter in the formatted plan output, e.g.

bytes scanned from remote: 1.23 MiB (72.4%)
bytes scanned from local cache: 363.00 KiB (21.4%)
bytes scanned from memory cache: 105.00 KiB (6.2%)

• hook disk/memory caches into the new counters so cache hits update the right stats

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why: profiling/metrics only

Type of change

• Performance Improvement
• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Other (please describe):

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This change is 

[github-actions]

Docker Image for PR

• tag: pr-18975-31804d8-1763177210

note: this image tag is only available for internal use.

[github-actions]

🤖 CI Job Analysis (Retry 1)

Workflow: 19391529825

📊 Summary

• Total Jobs: 83
• Failed Jobs: 7
• Retryable: 0
• Code Issues: 7

❌ NO RETRY NEEDED

All failures appear to be code/test issues requiring manual fixes.

🔍 Job Details

• ❌ linux / test_stateful_standalone: Not retryable (Code/Test)
• ❌ linux / sqllogic / standalone_udf_server: Not retryable (Code/Test)
• ❌ linux / sqllogic / standalone_cloud: Not retryable (Code/Test)
• ❌ linux / sqllogic / standalone (standalone, 2c8g, http): Not retryable (Code/Test)
• ❌ linux / sqllogic / standalone (standalone, 2c8g, hybrid): Not retryable (Code/Test)
• ❌ linux / sqllogic / cluster (cluster, 2c8g, hybrid): Not retryable (Code/Test)
• ❌ linux / sqllogic / cluster (cluster, 2c8g, http): Not retryable (Code/Test)

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🤖 About

Automated analysis using job annotations to distinguish infrastructure issues (auto-retried) from code/test issues (manual fixes needed).