[Backend] stream.controller.ts.listStreams: extract magic limit cap of 100 to a constant

[ogazboiz]

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Why this matters

backend/src/controllers/stream.controller.ts lines 167-171:

const parsedLimit = Math.min(
  typeof limit === 'string' ? (Number.parseInt(limit, 10) || 20) : 20,
  100
);

The 20 default and 100 cap are unexplained inline magic. The events listing in the same file (line 282-285) uses different magic numbers (50 default, 500 cap). The user-events controller (backend/src/controllers/user.controller.ts:80-82) uses yet another (50 default, 200 cap). Three pagination tunables — none named.

Acceptance criteria

• Define DEFAULT_STREAM_PAGE_SIZE = 20, MAX_STREAM_PAGE_SIZE = 100 at module scope in stream.controller.ts
• Do the same for the events listing (DEFAULT_EVENTS_PAGE_SIZE, MAX_EVENTS_PAGE_SIZE) and the user-events controller
• Reuse the events listing's existing MAX_EVENT_LIMIT/DEFAULT_EVENT_LIMIT already declared in routes/v1/events.routes.ts:24-25 for consistency

Files to touch

• backend/src/controllers/stream.controller.ts (lines 167-171, 282-285)
• backend/src/controllers/user.controller.ts (lines 80-82)

Out of scope

• Introducing a shared pagination middleware

[distributed-nerd]

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[Emmy6654]

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[dorismaduegbunam]

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