feat: add public v1 endpoints (CM-967)

[skwowet]

Note

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[joanagmaia]

@skwowet only 1 endpoint missing at this point which is to get the project affiliations with the associated maintainers roles services/apps/data_sink_worker/src/service/member.service.ts.

We can add this after, non-blocking for the PR

[themarolt]

If createMemberOrganization fails to insert undefined is returned because on conflict do nothing returning id means that if there is a conflict do nothing but if there is no conflict insert and return id. Meaning that in case of a conflict we don't get existing id from the db so we return undefined... Meaning that end result could be NotFoundError('Work experience not found after creation') even though we could create work experience for existing org.

[joanagmaia]

Updated it so that the query now uses a CTE with UNION ALL to fall back to selecting the existing row on conflict.

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Unawaited promise may cause unhandled rejection crash

Low Severity

sendSlackNotification returns a Promise that is neither awaited nor has a .catch() handler. If the Slack call fails (e.g., network timeout), the rejected promise becomes an unhandled rejection, which can crash the Node.js process depending on the runtime configuration.