Accelerate nested form construction

[trissim]

What changed

• consume ObjectState's indexed direct-child topology
• coalesce responsive-row construction into one layout transaction while retaining reflow when group geometry changes
• resolve placeholders from canonical full paths
• keep live widgets and mutable values uncached
• pin quality tools and block fatal package errors plus configured Ruff diagnostics on Git-derived added lines without a synchronized violation roster
• report historical repository-wide Ruff, Black, and Mypy baselines explicitly as non-blocking
• release the change as 0.1.28 with ObjectState 1.0.21

Why

Repeated nested-widget construction paid for redundant full-map scans and intermediate layout reflows. ObjectState already owns the immutable field topology, so PyQT-reactive can consume that projection without duplicating semantic state or caching QObjects.

Impact

A representative 148-row form improved from about 400 ms to 289 ms median declared-field completion in the final local run while preserving the exact 21-manager topology.

Validation

• clean public-dependency environment resolved ObjectState 1.0.21 from site-packages
• exact CI test command: 258 passed
• Sphinx warning-as-error build: 44 sources passed
• full-package baseline-clean Ruff fatal gate: passed
• Git-derived added-line Ruff gate: passed
• representative OpenHCS config-window lifecycle suite: 54 passed
• benchmark retained the exact 21-manager, 148-row topology

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[augmentcode]

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