feat(content-insights): performance improvements [MAPS-256]

[Adrian Meyer (primeinteger)]

Purpose

Fix Content Insights load times on large spaces by replacing serial offset pagination with parallel cursor streams.

Approach

• Replace the single entry.getMany skip/limit loop with entry.getManyWithCursor.
• Fan out one cursor stream per content type with bounded concurrency (FETCH_CONFIG.CONCURRENCY = 5, headroom under the ~7 req/s CMA limit) via a small concurrentMap worker pool.
• Extract cursorPaginate to drain any cursor-paginated CMA endpoint, preserving the existing adaptive batch-shrinking on Response size too big (halve down to MIN_BATCH_SIZE).
• Lift useContentTypes ahead of useAllEntries in Dashboard and pass content type ids in -- entries fetch is now keyed on the resolved id list.
• Bump contentful-management 11.63.1 -> 11.76.0 for getManyWithCursor.