Doc updates

[abnegate]

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[github-actions]

📊 Coverage

Metric	PR	Baseline	Δ
Lines	91.75% (6797/7408)	91.75%	+0.00%
Methods	83.39% (929/1114)	83.39%	+0.00%
Classes	63.47% (106/167)	63.47%	+0.00%

Full per-file breakdown in the job summary.

[greptile-apps]

Greptile Summary

This PR updates README.md to document a substantial set of API changes and new features: Plan renamed to Statement, Query::contains() deprecated in favour of containsString()/containsAny(), set() / fromSelect() / onConflict() signatures updated, and new builder capabilities added (whereRaw/whereColumn, Sequences, RETURNING, CHECK constraints, generated columns, composite primary keys, ClickHouse engine/TTL selection). Inline FQCNs are uniformly replaced with use aliases for readability. The documentation is self-consistent throughout.

Confidence Score: 5/5

Documentation-only PR; no executable code changed, safe to merge.

All changes are confined to README.md. The API descriptions, code snippets, feature matrix rows, and cross-references are consistent with each other throughout the diff. No logical, syntax, or security concerns were identified.

No files require special attention.

Important Files Changed

Filename	Overview
README.md	Documentation-only update covering API renames (Plan→Statement, contains→containsString, set/fromSelect/onConflict signature changes), new feature sections (whereRaw/whereColumn, Sequences, RETURNING, CHECK Constraints, Generated Columns, Composite Primary Keys, ClickHouse Engine/TTL), and feature matrix corrections; changes are internally consistent and accurate.

_{Reviews (1): Last reviewed commit: "docs(readme): fix MongoDB upsert example..." | Re-trigger Greptile}