[Backend] Add pagination to GET /v1/users/:publicKey/events

[ogazboiz]

Telegram: https://t.me/+DOylgFv1jyJlNzM0

Why this matters

getUserEvents in backend/src/controllers/user.controller.ts (lines ~70-96) does an unbounded prisma.streamEvent.findMany({ where: { stream: { OR: [...] } }, orderBy, include: { stream: true } }) with no take/skip. For an active wallet this returns every event ever, growing without bound and risking slow responses and large payloads. fetchUserEvents in frontend/src/lib/dashboard.ts (used by components/Dashboard.tsx) consumes this endpoint, so the dashboard pays the full cost.

The per-stream events endpoint (#364) and the per-wallet /v1/events endpoint are already paginated; this user-events endpoint was missed.

Acceptance criteria

• Add limit (default e.g. 50, capped e.g. 200) and offset/page query params.
• Return a paginated envelope consistent with the other endpoints ({ data/events, total, hasMore }).
• Keep reverse-chronological ordering.
• Update the Swagger block on the route.

Files to touch

• backend/src/controllers/user.controller.ts
• backend/src/routes/v1/user.routes.ts

Out of scope

• Changing how the frontend Dashboard consumes it (can be a follow-up if needed).

[Mosas2000]

@Mosas2000 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi maintainer, I'd like to take on this issue as i'll fully implement what is requested as i'm a full-stack developer with experiences.

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