fix(query-db-collection): respect QueryClient defaultOptions when not overriden

[KyleAMathews]

Previously, queryCollectionOptions would set query options (staleTime, retry, retryDelay, refetchInterval, enabled, meta) to undefined even when not provided in the config. This prevented QueryClient's defaultOptions from being used as fallbacks.

The fix conditionally includes these options in the observerOptions object only when they are explicitly defined (not undefined), allowing TanStack Query to properly use defaultOptions from the QueryClient.

Added comprehensive tests to verify:

1. defaultOptions are respected when not overridden in queryCollectionOptions
2. explicit options in queryCollectionOptions override defaultOptions
3. retry behavior from defaultOptions works correctly

Fixes issue where users couldn't use QueryClient defaultOptions with QueryCollection

🤖 Generated with Claude Code

🎯 Changes

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

[changeset-bot]

🦋 Changeset detected

Latest commit: fa1ac86

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@tanstack/query-db-collection	Patch
@tanstack/db-example-react-todo	Patch

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commit: fa1ac86

[github-actions]

Size Change: 0 B

Total Size: 84.3 kB

ℹ️ View Unchanged

Filename	Size
./packages/db/dist/esm/collection/change-events.js	1.63 kB
./packages/db/dist/esm/collection/changes.js	1.01 kB
./packages/db/dist/esm/collection/events.js	413 B
./packages/db/dist/esm/collection/index.js	3.23 kB
./packages/db/dist/esm/collection/indexes.js	1.16 kB
./packages/db/dist/esm/collection/lifecycle.js	1.8 kB
./packages/db/dist/esm/collection/mutations.js	2.52 kB
./packages/db/dist/esm/collection/state.js	3.79 kB
./packages/db/dist/esm/collection/subscription.js	2.2 kB
./packages/db/dist/esm/collection/sync.js	2.2 kB
./packages/db/dist/esm/deferred.js	230 B
./packages/db/dist/esm/errors.js	3.48 kB
./packages/db/dist/esm/event-emitter.js	798 B
./packages/db/dist/esm/index.js	1.62 kB
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./packages/db/dist/esm/indexes/base-index.js	835 B
./packages/db/dist/esm/indexes/btree-index.js	2 kB
./packages/db/dist/esm/indexes/lazy-index.js	1.21 kB
./packages/db/dist/esm/indexes/reverse-index.js	577 B
./packages/db/dist/esm/local-only.js	967 B
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./packages/db/dist/esm/optimistic-action.js	294 B
./packages/db/dist/esm/proxy.js	3.86 kB
./packages/db/dist/esm/query/builder/functions.js	615 B
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./packages/db/dist/esm/query/compiler/expressions.js	760 B
./packages/db/dist/esm/query/compiler/group-by.js	2.04 kB
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./packages/db/dist/esm/query/compiler/select.js	1.28 kB
./packages/db/dist/esm/query/ir.js	785 B
./packages/db/dist/esm/query/live-query-collection.js	404 B
./packages/db/dist/esm/query/live/collection-config-builder.js	5.54 kB
./packages/db/dist/esm/query/live/collection-registry.js	233 B
./packages/db/dist/esm/query/live/collection-subscriber.js	2.11 kB
./packages/db/dist/esm/query/optimizer.js	3.26 kB
./packages/db/dist/esm/scheduler.js	1.29 kB
./packages/db/dist/esm/SortedMap.js	1.24 kB
./packages/db/dist/esm/transactions.js	3.05 kB
./packages/db/dist/esm/utils.js	1.01 kB
./packages/db/dist/esm/utils/browser-polyfills.js	365 B
./packages/db/dist/esm/utils/btree.js	6.01 kB
./packages/db/dist/esm/utils/comparison.js	754 B
./packages/db/dist/esm/utils/index-optimization.js	1.73 kB

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[github-actions]

Size Change: 0 B

Total Size: 2.89 kB

ℹ️ View Unchanged

Filename	Size
./packages/react-db/dist/esm/index.js	168 B
./packages/react-db/dist/esm/useLiveInfiniteQuery.js	1.41 kB
./packages/react-db/dist/esm/useLiveQuery.js	1.31 kB

_{compressed-size-action::react-db-package-size}

[samwillis]

Looks good to me

[github-actions]

🎉 This PR has been released!

• @tanstack/query-db-collection@0.2.34

Thank you for your contribution!