Rewrite profile enrichment with immutable updates and cache repair

Three fixes:
- Use immutable deep-clone (deepEnrich) instead of in-place mutation
  so React properly detects changes in nested structures like
  InfiniteData<{pages: [{follows: [...]}]}>
- Add repairPersistedCache() to detect and remove corrupted persisted
  query data (arrays turned into {0:..., 1:...} objects) on startup
- Batch all enrichments into a single applyEnrichments call per batch
  to minimize setQueryData calls

Author: rudyfraser