feat(spaces): preload_from_hub bakes models into image at build time

Adds the YAML directive to README so HF's build pipeline pre-downloads
all 80 GB of models into the Docker image's HF cache before the app
starts. Net effect:

- Models persist across container restarts AND redeploys (cached image)
- Available at app startup, not on first inference (UX win)
- $0 extra cost (uses Pro's existing build infrastructure)
- Compatible with sdk: gradio so ZeroGPU still works (Docker SDK would
break ZeroGPU)
- Code-only pushes don't re-run the preload step (cache layer keyed on
README content)

Tradeoff: first push triggers a one-time ~20-30 min build while HF's
internal infra fetches 80 GB. Subsequent code pushes are fast.

README.md

@@ -9,6 +9,23 @@ app_file: app.py
 python_version: "3.11"
 suggested_hardware: zero-a10g
 hf_oauth: false
+preload_from_hub:
+  - Comfy-Org/ltx-2 split_files/text_encoders/gemma_3_12B_it.safetensors
+  - Kijai/LTX2.3_comfy diffusion_models/ltx-2.3-22b-dev_transformer_only_bf16.safetensors,loras/ltx-2.3-22b-distilled-lora-dynamic_fro09_avg_rank_105_bf16.safetensors,text_encoders/ltx-2.3_text_projection_bf16.safetensors,vae/LTX23_audio_vae_bf16.safetensors,vae/LTX23_video_vae_bf16.safetensors,vae/taeltx2_3.safetensors
+  - Lightricks/LTX-2-19b-IC-LoRA-Detailer ltx-2-19b-ic-lora-detailer.safetensors
+  - Lightricks/LTX-2-19b-IC-LoRA-Pose-Control ltx-2-19b-ic-lora-pose-control.safetensors
+  - Lightricks/LTX-2-19b-LoRA-Camera-Control-Dolly-In ltx-2-19b-lora-camera-control-dolly-in.safetensors
+  - Lightricks/LTX-2-19b-LoRA-Camera-Control-Dolly-Left ltx-2-19b-lora-camera-control-dolly-left.safetensors
+  - Lightricks/LTX-2-19b-LoRA-Camera-Control-Dolly-Out ltx-2-19b-lora-camera-control-dolly-out.safetensors
+  - Lightricks/LTX-2-19b-LoRA-Camera-Control-Dolly-Right ltx-2-19b-lora-camera-control-dolly-right.safetensors
+  - Lightricks/LTX-2-19b-LoRA-Camera-Control-Jib-Down ltx-2-19b-lora-camera-control-jib-down.safetensors
+  - Lightricks/LTX-2-19b-LoRA-Camera-Control-Jib-Up ltx-2-19b-lora-camera-control-jib-up.safetensors
+  - Lightricks/LTX-2-19b-LoRA-Camera-Control-Static ltx-2-19b-lora-camera-control-static.safetensors
+  - Lightricks/LTX-2.3 ltx-2.3-22b-dev.safetensors,ltx-2.3-22b-distilled-lora-384.safetensors,ltx-2.3-22b-distilled.safetensors,ltx-2.3-spatial-upscaler-x2-1.0.safetensors
+  - Lightricks/LTX-2.3-22b-IC-LoRA-Motion-Track-Control ltx-2.3-22b-ic-lora-motion-track-control-ref0.5.safetensors
+  - Lightricks/LTX-2.3-22b-IC-LoRA-Union-Control ltx-2.3-22b-ic-lora-union-control-ref0.5.safetensors
+  - google/gemma-3-12b-it-qat-q4_0-unquantized gemma-3-12b-it/model-00001-of-00005.safetensors,gemma-3-12b-it/model-00002-of-00005.safetensors,gemma-3-12b-it/model-00003-of-00005.safetensors,gemma-3-12b-it/model-00004-of-00005.safetensors,gemma-3-12b-it/model-00005-of-00005.safetensors,gemma-3-12b-it/model.safetensors.index.json,gemma-3-12b-it/preprocessor_config.json,gemma-3-12b-it/tokenizer.model
+  - unsloth/LTX-2.3-GGUF ltx-2.3-22b-dev-BF16.gguf
 ---
 
 # LTX 2.3 All-in-One Video Generator