chore: add public API alerting

[joanagmaia]

Issue reported by the LF SS team: https://linuxfoundation.atlassian.net/browse/LFXV2-1578?focusedCommentId=111986&sourceType=mention. The 409 error is thrown when the LF SS api tries to query our API for 2 identities that belong to different users. For now we want to fix these profiles manually. This will be given to the data quality team.

⚠️ Do not merge this PR until the new slack channel and webhook are provisioned.

This pull request enhances error handling and alerting for the public API by introducing a new Slack alert channel specifically for conflict errors (HTTP 409). It also updates the Slack integration to support this new channel. The most important changes are grouped below:

Error Handling Improvements:

• Added handling for ConflictError in the public API's errorHandler middleware, which now sends a Slack notification to the new CDP_LFX_SELF_SERVE_ALERTS channel when a conflict occurs, providing request and error details.
• Updated the middleware imports to include the new ConflictError from @crowd/common.

Slack Integration Updates:

• Added a new Slack channel enum value CDP_LFX_SELF_SERVE_ALERTS in SlackChannel to support targeted alerting.
• Updated the Slack channel webhook URL mapping to include the new CDP_LFX_SELF_SERVE_ALERTS channel, using its corresponding environment variable for the webhook URL.

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Note

Medium Risk
Adds new behavior in the public API error middleware to emit Slack alerts on 409 Conflict, and introduces a new Slack channel/env var dependency that could cause missing-config warnings or noisy alerting if conflicts are frequent.

Overview
Adds targeted Slack alerting for public API 409 Conflict responses: errorHandler now special-cases ConflictError, logs a warning, and sends a notification to the new SlackChannel.CDP_LFX_SELF_SERVE_ALERTS including request details and optional error context.

Extends ConflictError to accept an optional context object and updates resolveMemberByIdentities to attach the conflicting memberIds, and updates the Slack library to include the new channel plus its webhook env var mapping.

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[Copilot]

Pull request overview

Adds targeted Slack alerting for Public API 409 Conflict errors (to support manual remediation of conflicting identities), and extends the shared Slack library with a dedicated channel + webhook mapping.

Changes:

• Added SlackChannel.CDP_LFX_SELF_SERVE_ALERTS to route LFX self-serve conflict alerts separately.
• Mapped the new channel to CDP_LFX_SELF_SERVE_ALERTS_SLACK_WEBHOOK_URL.
• Updated the Public API errorHandler to detect ConflictError and send a Slack notification on 409s.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
services/libs/slack/src/types.ts	Adds a new SlackChannel enum value for LFX self-serve conflict alerting.
services/libs/slack/src/channels.ts	Adds env var mapping for the new channel (but currently introduces a TypeScript typing error).
backend/src/api/public/middlewares/errorHandler.ts	Sends a Slack notification when a ConflictError occurs in the public API.

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Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.