identifiability() previously used torch.linalg.pinv on the regularized Fisher information matrix, which silently returned rel_crlb=0 for any parameter with near-zero sensitivity to the excitation (e.g. `sat` when the excitation never reaches the saturation limit) instead of a large value -- the opposite of correct CRLB semantics. Affected 9.3% of all 240,000 rows (46.4% of the saturate family). Fixed via a true regularized inverse (eigendecomposition, float64); every shard's rel_crlb/log10_cond was recomputed in place. u, y, and theta are byte-identical to the previous revision (verified via sha256 before/after) -- only the two annotation fields changed. See github.com/Soarr01/plantforge commits b82b787 (code fix) and cf04f5a (corpus regeneration) for full detail.
