feat(gallery): add Wan 2.1 I2V 14B 720P + pin all wan ggufs by sha256
Adds a new entry for the native-720p image-to-video sibling of the
480p I2V model (wan-2.1-i2v-14b-480p-ggml). The 720p I2V model is
trained purely as image-to-video — no first-last-frame interpolation
path — so motion is freer than repurposing the FLF2V 720P variant as
an i2v. Shares the same VAE, umt5_xxl text encoder, and clip_vision_h
auxiliary files as the existing 480p I2V and 720p FLF2V entries, so
no new aux downloads are introduced.
Also pins the main diffusion gguf by sha256 for the new entry and for
the three existing wan entries that were previously missing a hash
(wan-2.1-t2v-1.3b-ggml, wan-2.1-i2v-14b-480p-ggml,
wan-2.1-flf2v-14b-720p-ggml). Hashes were fetched from HuggingFace's
x-linked-etag header per .agents/adding-gallery-models.md.
Assisted-by: Claude:claude-opus-4-7
8ab56e2ad3