release: prepare 0.14.0

[ictechgy]

Summary

• bump the single package version source to 0.14.0
• mark the merged cost recommendation and sanitized provider-usage work as the 0.14.0 release candidate
• preserve built-in routing and one-child execution behavior

Release classification

This is an additive 0.x minor release: it publishes the new task-free review-cost-profile and non-executing recommend CLI surfaces plus offline aggregate-only provider-usage evaluation. No existing built-in route, execution path, policy schema, or vendor boundary changes.

Fresh verification

• Python 3.10: 816 tests passed with ResourceWarning as error
• Python 3.14: 816 tests passed with ResourceWarning as error
• Ruff 0.16.2 check and format: passed
• mypy strict: 107 source files passed
• Python 3.13 wheel/sdist build: weightclass-0.14.0
• Twine strict metadata: passed
• extracted-sdist isolation: 810 passed, 13 platform skips
• clean Python 3.13 wheel install: version/classify/recommendation smokes passed