feat: /v2/snapshot/diff

[ltdrdata]

Saves the current system state as a new snapshot

added: /v2/snapshot/diff
modified: use 'packaging.version` instead custom StrictVersion

{
  "nodepack_diff": {
    "added": {
      "comfyui-detail-daemon": "1.1.2"
    },
    "removed": [
      "comfyui-wd14-tagger",
      "https://github.com/ltdrdata/was-node-suite-comfyui",
      "https://github.com/mcmonkeyprojects/sd-dynamic-thresholding",
      "https://github.com/kijai/ComfyUI-SUPIR",
      "https://github.com/shingo1228/ComfyUI-SDXL-EmptyLatentImage"
    ],
    "upgraded": {
      "comfyui-custom-scripts": {
        "from": "1.2.5",
        "to": "1.3.0"
      }
    },
    "downgraded": {
      "comfyui-wd14-tagger": {
        "from": "1.0.1",
        "to": "0.9"
      }
    },
    "changed": [
      "comfyui",
      "https://github.com/ltdrdata/ComfyUI-Impact-Pack",
      "https://github.com/ltdrdata/ComfyUI-Impact-Subpack",
      "https://github.com/Fannovel16/comfyui_controlnet_aux",
      "https://github.com/ltdrdata/ComfyUI-Inspire-Pack"
    ]
  },
  "pip_diff": {
    "added": {

    },
    "upgraded": {
      "markupsafe": {
        "from": "2.1.5",
        "to": "3.0.2"
      },
      "setuptools": {
        "from": "78.1.0",
        "to": "80.7.1"
      },
      "urllib3": {
        "from": "1.26.20",
        "to": "2.4.0"
      }
    },
    "downgraded": {
      "aiofiles": {
        "from": "24.1.0",
        "to": "23.2.1"
      },
      "aiohttp": {
        "from": "3.12.13",
        "to": "3.11.14"
      },
      "aiosignal": {
        "from": "1.4.0",
        "to": "1.3.2"
      },
      "av": {
        "from": "15.0.0",
        "to": "14.2.0"
      },
      "certifi": {
        "from": "2025.7.14",
        "to": "2025.4.26"
      },
      "cmake": {
        "from": "4.0.3",
        "to": "3.31.4"
      },
      "comfyui-frontend-package": {
        "from": "1.23.4",
        "to": "1.20.5"
      }
    }
  }
}