fix(anima): ignore community checkpoint pos_embedder runtime buffers (#9201)

Some community-trained Anima checkpoints (e.g. animaCatTower_v10) serialize
`pos_embedder.dim_spatial_range`, `pos_embedder.dim_temporal_range`, and
`pos_embedder.seq`. The official model registers the first two as
non-persistent buffers and never stores `seq` (it is a local in
`generate_embeddings`), so `load_state_dict` rejects them as unexpected and
generation fails after a successful probe. Drop them alongside the existing
`inv_freq` filter — they are regenerated at runtime from architecture
parameters.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: Jonathan <34005131+JPPhoto@users.noreply.github.com>