docs: update incremental benchmarks (3.1.2)

[github-actions]

Automated incremental benchmark update for 3.1.2 from workflow run #271.

[greptile-apps]

Greptile Summary

This automated PR appends v3.1.2 incremental benchmark results to generated/benchmarks/INCREMENTAL-BENCHMARKS.md, covering native Rust and WASM engine timings across 235 files, and updates the "Latest results" prose section and embedded JSON data block accordingly.

Key data points added:

• Native full build: 1.2s (↑6% vs 3.1.0), 1-file rebuild: 264ms (↓20% — a notable improvement)
• WASM full build: 2.9s (~, unchanged), 1-file rebuild: 488ms (↓9%)
• Import resolution speedup: improved from 1.9× to 2.4× (218 import pairs, native 2ms vs JS 5ms)
• All three representations of the data (summary table, "Latest results" section, and the JSON comment block) are internally consistent — rounded display values match their JSON counterparts and the percentage deltas are arithmetically correct
• No version 3.1.1 entry is present; this appears consistent with the existing pattern where not every release receives a dedicated benchmark run

Confidence Score: 5/5

• Documentation-only automated update with no code changes — safe to merge.
• The PR touches a single generated Markdown file. All numeric values in the display tables, "Latest results" section, and embedded JSON block are internally consistent. Percentage deltas are arithmetically correct and the file follows the established format exactly.
• No files require special attention.

Important Files Changed

Filename	Overview
generated/benchmarks/INCREMENTAL-BENCHMARKS.md	Adds 3.1.2 benchmark rows to the summary table, updates the "Latest results" section, and appends the raw JSON data block — all values are internally consistent.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Workflow Run #271] --> B[Collect benchmark data\nv3.1.2 / 235 files]
    B --> C{Engine}
    C -->|Native Rust| D[Full build: 1.2s\nNo-op: 5ms\n1-file: 264ms]
    C -->|WASM| E[Full build: 2.9s\nNo-op: 6ms\n1-file: 488ms]
    B --> F[Import Resolution\n218 pairs\nnative: 2ms · JS: 5ms\nSpeedup: 2.4x]
    D --> G[INCREMENTAL-BENCHMARKS.md\nTable + Latest Results + JSON]
    E --> G
    F --> G

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_{Last reviewed commit: a4b9a64}