rawkv: add documentation to rawkv.NewClientWithOptsd

[healthwaite]

Add documenation to rawkv.NewClientWithOpts to prevent erroneous use of the API. Which can cause hard to debug PD leadership transfer failures.

Summary by CodeRabbit

• Documentation
  • Clarified that the context provided when creating a client is retained for long-running background operations.
  • Documented that the context should outlive the client and that canceling it aborts those operations.

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• rawkv/rawkv.go

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• rawkv/rawkv.go

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📝 Walkthrough

Walkthrough

The NewClient documentation now points to NewClientWithOpts. The NewClientWithOpts documentation describes how the client retains its context for background operations and how context lifetime and cancellation affect those operations.

Changes

Client constructor documentation

Layer / File(s)	Summary
Constructor and context guidance rawkv/rawkv.go	The NewClient documentation points to NewClientWithOpts. The NewClientWithOpts documentation states that its context is retained for background operations, should outlive the client, and that cancellation aborts those operations.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Merge Risk: ⚪ Minimal · up to 39fc2

The constructor guidance correctly warns callers to keep the context alive for the client lifetime so PD failover operations remain available.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title correctly identifies the documentation change for rawkv.NewClientWithOpts. It contains a typo in the API name: "NewClientWithOptsd".
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 1 files.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
In `@rawkv/rawkv.go`:
- Line 204: Remove the duplicated “for” in the comment near the Client context
usage so it reads “used for long-running background operations.”

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📒 Files selected for processing (1)

• rawkv/rawkv.go

Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review.