Optimize aligned row and tablet memory estimation

[jt2594838]

Summary

• Add aligned single-row and tablet incremental memory estimators for lazily materialized primitive arrays.
• Reuse per-device estimators across multi-row inserts to reduce temporary Map/Set allocations.
• Add focused unit tests and a branch-comparison benchmark for row and tablet paths.

Performance

• Multi-row InsertRows time improved by about 13.6%-25.1% versus the local dev/1.3 baseline.
• Large-batch allocations reduced by about 37.7%-91.2%.
• Existing-column single-row and tablet paths show the largest gains; new-column single-row paths remain a known tradeoff.

Tests

• AlignedTVListTest: 18/18
• TsFileProcessorTest: 18/18
• AlignedRowsBranchComparisonBenchmarkTest: 1/1
• git diff --check