Document the 49 failing tests with clear categorization:
- 14 tests need HDF5 (aster_read_mesh)
- 30 tests have API signature mismatches
- 2 tests already fixed (Analysis export, Statistics)
Includes 4-phase action plan with time estimates.
Good news: Core architecture is sound (package loads, 5 tests pass).
Failures are mechanical API compatibility issues from Julia evolution
(0.6 → 1.12 over 6 years), not fundamental problems.
Jukka Aho