v0.46.19

Added

• IDE initialization environment selection: specfact init ide --env-manager <auto|uv|hatch|poetry|pip>
  now lets users explicitly select the environment manager used for IDE setup.

Fixed

• Runtime module discovery: load installed module dependency src roots
  reliably, classify load failures in availability diagnostics, and detect
  environment managers in rootless monorepos.
• Runtime discovery CI smoke: add direct, pip-editable, and uvx install
  path coverage for module install, upgrade command availability, init, and
  installed specfact code command loading.