v0.4.2

Expanded Python SDK array API coverage (9 new modules) and bumped the
fastmcp dependency to the 3.x line so tests against its public API
surface work on a fresh install.

Added

• pfc_browse_python_api / pfc_query_python_api now cover the
  vectorized array API: ballarray, clumparray, wallarray,
  rblockarray, and the four contact-pair arrays (ballballarray,
  ballfacetarray, ballpebblearray, pebblepebblearray,
  pebblefacetarray). Availability is encoded per function with
  availability.versions covering PFC 6.0 / 7.0 / 9.0.

Changed

• Bump minimum fastmcp to >=3.0.0. Tests now use FastMCP's public
  mcp.call_tool(...) / mcp.list_tools() API.
• pfc_browse_commands lower-cases command input so mixed-case paths
  (e.g. "Ball Create") resolve correctly, and the "command not found"
  suggestion list is now version-filtered (no more 9.0-only commands
  surfaced when querying 6.0).
• pfc_browse_python_api no longer echoes the full functions block
  inside summary when browsing a module, avoiding response truncation
  on large modules.

Fixed

• Corrected availability.versions on the new array docs:
  rotation / set_rotation / fill_rotation entries were removed
  (they don't exist in any PFC version), and euler / moi_prin
  families are now correctly marked as available on PFC 6.0 as well,
  not 7.0/9.0 only. Verified against PFC 6.0 and 9.0 GUI bridges.