chore(deps): used cargo features prune to reduce the deps count

[ValDesign22]

This pull request introduces several improvements and refactors to the build pipeline, dependency management, and API code. The most significant changes are grouped below by theme.

Build Pipeline and Docker Workflow Improvements:

• Updated the GitHub Actions workflow to use a fixed Docker registry repository name, added explicit permissions for contents and packages, and introduced Docker Buildx setup for improved build caching and multi-platform support. Also, switched the Dockerfile path and enabled registry-based build cache. [1] [2] [3]
• Enhanced Docker image tagging logic to normalize branch names and tag images per branch, with additional tagging for master as latest.
• Added a notify job to the workflow that posts or updates a preview comment on open PRs, informing contributors of available Docker preview images for each variant.
• Refactored the Dockerfile to introduce a dedicated final-build stage, enabled --all-features for dependency cooking, and updated the runtime stage to copy from the new build stage. [1] [2]

Dependency Management:

• Cleaned up and updated dependencies in Cargo.toml: removed unnecessary features, bumped mongodb to 3.5.2, simplified feature sets for several crates, and streamlined tokio and tracing configurations. [1] [2] [3]

API and Repository Enhancements:

• Introduced CustomEventUpdatePayload for event updates, replacing the previous CustomEventBody in update endpoints, and adjusted the update logic to only allow updating the graph_name. [1] [2] [3] [4] [5]
• On event deletion, now also removes the event from bot stats, logging any errors encountered during this process. Added remove_event_from_stats method to BotStatsRepository. [1] [2]

Miscellaneous Improvements:

• Minor update to bot token regeneration email template for clearer messaging.

[github-actions]

🐳 Docker preview images are ready!

Preview images are available for this PR:

Variant	Tag
Default	ghcr.io/discordanalytics/api:chore-reduce-deps
Full	ghcr.io/discordanalytics/api:chore-reduce-deps-full
Mails	ghcr.io/discordanalytics/api:chore-reduce-deps-mails
Reports	ghcr.io/discordanalytics/api:chore-reduce-deps-reports

You can mention a maintainer to update it.

[github-actions]

🎉 This PR is included in version 1.0.0 🎉

The release is available on:

• GitHub release
• v1.0.0

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