Add caveman intensity levels, output mode instructions, validation, and
preview diffs across the compression pipeline.
Extend MCP and dashboard settings to support auto-trigger mode, system
prompt preservation, MCP description compression, and caveman rule
metadata. Record richer compression analytics with receipt fields,
validation fallbacks, output mode data, and add the related database
migration.
Improve preservation handling for code, URLs, markdown, math, and other
protected content while adding broad unit, integration, and golden-set
coverage for caveman parity and compression behavior.
Add unit tests for strategy selector (17), lite compression (20), stats module (11), and DB module (7). Add integration tests for full compression pipeline (6). All 61 tests pass. Remove broken integration test files from previous WIP.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
