[R2 Data Catalog] Document deferred purge and deletion grace period

[agaddis02]

Summary

Documents R2 Data Catalog deferred purge behavior and the deletion grace period property:

• Clarifies that DROP TABLE ... PURGE defers physical file deletion by a configurable safety grace period (default 6 days / 518,400 seconds).
• Documents the reserved property cloudflare-data-catalog.deletion.grace-period-seconds settable on tables and namespaces.
• Adds Spark SQL and PyIceberg configuration examples.
• Notes location reuse safety during the deferred purge window (new tables receive a unique storage prefix).

AI assisted with research and drafting.

Documentation checklist

• The change adheres to the documentation style guide.

[cloudflare-docs-bot]

Review

⚠️ 1 warning, 💡 1 suggestion found in commit 022e323.

👉 Fix in your agent 👈

Fix the following review findings in PR #33567 (https://github.com/cloudflare/cloudflare-docs/pull/33567).

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---

## Code Review

### Warnings (1)

#### CR-d5463b78bc6a · Incorrect PyIceberg API usage
- **File:** `src/content/docs/r2-data-catalog/deleting-data.mdx` line 128
- **Issue:** The PyIceberg `Transaction` yielded by `table.transaction()` has no `set_properties` method — `set_properties` is defined on `UpdateTableProperties`, returned by `transaction.update_properties()`. Running this example raises `AttributeError: 'Transaction' object has no attribute 'set_properties'`.
- **Fix:** Use `transaction.update_properties().set_properties({"cloudflare-data-catalog.deletion.grace-period-seconds": "86400"})`, or `table.update_properties().set_properties({...}).commit()` outside a transaction.

---

## Style Guide Review

### Suggestions (1)

#### SG-a1588fea9ec7 · Bullet list with fewer than three items
- **File:** `src/content/docs/r2-data-catalog/deleting-data.mdx` line 102
- **Issue:** Lines 102-103 form a two-item bullet list (Default grace period / Configuring the grace period).
- **Fix:** Consider writing these two points as prose instead of a bullet list.

Code Review

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Warnings (1)

File

Issue

r2-data-catalog/deleting-data.mdx line 128

Incorrect PyIceberg API usage — The PyIceberg Transaction yielded by table.transaction() has no set_properties method — set_properties is defined on UpdateTableProperties, returned by transaction.update_properties(). Running this example raises AttributeError: 'Transaction' object has no attribute 'set_properties'. Fix: Use transaction.update_properties().set_properties({"cloudflare-data-catalog.deletion.grace-period-seconds": "86400"}), or table.update_properties().set_properties({...}).commit() outside a transaction.

Conventions

_{No convention issues found.}

Style Guide Review

Suggestions (1)

File	Issue
r2-data-catalog/deleting-data.mdx line 102	Bullet list with fewer than three items — Lines 102-103 form a two-item bullet list (Default grace period / Configuring the grace period). Fix: Consider writing these two points as prose instead of a bullet list.

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[cloudflare-docs-bot]

Review coverage

🟡 1 ownership area needs approval.

Suggested reviewers: @Marcinthecloud @sejoker

Needs approval	Eligible approvers	Suggested
r2-data-catalog	@jonesphillip, @laplab, @Marcinthecloud, @nagraham, @sejoker, @vovacf201, @cloudflare/product-owners	marcinthecloud, sejoker

CODEOWNERS mappings for displayed areas (1)

Pattern	Owners
/src/content/docs/r2-data-catalog/	@jonesphillip, @laplab, @Marcinthecloud, @nagraham, @sejoker, @vovacf201, @cloudflare/product-owners