Fix lint errors in text compression utilities

Add opt-in text compression utilities for coding tasks

Add deterministic anchor matching to all compression plans

Fix all mypy type errors and flaky embedding test

Fix all mypy type errors and flaky embedding test

Fix all ruff lint and format errors for CI

Fix GitHub URLs and PyPI badge links (v0.2.1)

Update CONTRIBUTING.md

Publish headroom-ai v0.2.0 to PyPI with DevEx fixes

feat: Add CCR architecture, TOIN telemetry, and DevEx improvements

Add cache optimization module with scalable dynamic content detection

Prepare for OSS release v0.2.0

Initial commit: Headroom SDK - LLM context optimization toolkit