Add verified column and badge for dashAI plugins

[Irozuku]

Summary

Plugins published by the official dashAI PyPI account (dashai.nocode) now show a Verified badge in the plugins UI. PyPI exposes no uploader account field through its API, so verification is derived from package author metadata: a plugin is verified when its author_email contains dashaisoftware@gmail.com or its author is DashAI team. This lets users distinguish official plugins from third party dashai-* packages.

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Type of Change

Check all that apply like this [x]:

• Backend change
• Frontend change
• CI / Workflow change
• Build / Packaging change
• Bug fix
• Documentation

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Changes (by file)

• DashAI/back/dependencies/database/models.py: add verified boolean column to the Plugin model (server_default "0").
• DashAI/alembic/versions/e2a9c4f1b8d3_add_verified_column_to_plugin.py: migration adding the verified column (revises 3db684f4090a).
• DashAI/back/plugins/utils.py: add _is_verified_author() helper and compute verified from author metadata in get_plugin_by_name_from_pypi.
• DashAI/back/api/api_v1/schemas/plugin_params.py: add verified: bool = False to PluginParams.
• DashAI/back/dependencies/database/utils.py: persist verified on plugin create, update, and upgrade.
• DashAI/front/src/types/plugin.ts: add verified: boolean to IPlugin.
• DashAI/front/src/pages/plugins/components/PluginsCard.jsx: render a verified badge (tooltip) in grid and list views.
• DashAI/front/src/pages/plugins/components/PluginsDetails.jsx: render a verified badge beside the title.
• DashAI/front/src/utils/i18n/locales/{en,es,pt,de,zh}/plugins.json: add label.verified string.
• tests/back/plugins/test_plugin_utils.py: parametrized test for _is_verified_author + updated output assertions.

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Testing

• To verify in app: trigger POST /api/v1/plugins/index to refresh from PyPI, then confirm official dashAI plugins show the badge.

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Notes

• verified is recomputed only on the plugins index refresh (POST /plugins/index). Existing DB rows default to false until refreshed.
• Verification relies on self-declared PyPI metadata (PyPI has no uploader-account API), so it is a best-effort signal, not a cryptographic guarantee. Matching constants live in DashAI/back/plugins/utils.py (_VERIFIED_AUTHOR_EMAIL, _VERIFIED_AUTHOR_NAME).