Enhance CLI and documentation for capturing VM inventory

- Introduced new `capture` commands in the CLI to allow users to merge VM inventory into local manifests without downloading weights.
- Updated `README.md` and `cli.md` to include detailed instructions for the new capture functionality, including options for models and extensions.
- Enhanced `decisions.md` to clarify the role of captured links in the manifest files.
- Improved `extensions.md` to document the process of capturing installed extensions back to the local configuration.
- Added new functions in `civitai.py` to support fetching model versions by hash and generating canonical URLs for models.

docs/cli.md

@@ -74,6 +74,10 @@ gpu-rent up --yes --ollama
 | `gpu-rent seed-extensions` | Доклонировать/обновить git-репы; restart swarmui |
 | `gpu-rent push` / `push-models` | Локальные деревья → VM |
 | `gpu-rent pull-output` | VM `Output/` → `./Output` |
+| `gpu-rent capture` / `capture all` | Инвентарь VM → merge **ссылок** в `models.yaml` + `extensions.yaml` (веса не качать) |
+| `gpu-rent capture models` / `--kind lora` | Только модели (фильтр по типу) |
+| `gpu-rent capture extensions` | Только git Extensions / DLNodes |
+| `gpu-rent capture --dry-run` | Отчёт без записи файлов |
 | `gpu-rent resize-data --gb 400` | Data volume **только вверх** |
 | `gpu-rent watchdog install` / `uninstall` / `status` / `tick` | Локальный safety-net (см. ниже) |