fix: correct two example bugs caught by skills#70's review

[kriszyp]

Summary

• release-notes/v5-lincoln/v5-migration.md: the polling-loop example was missing await on delay(100) — since delay is imported from node:timers/promises, the un-awaited call turned the intended ~10Hz poll into a tight loop that hammers Table.get as fast as the read path allows.
• reference/rest/querying.md: the resellers relationship example pointed from at the singular resellerId, which the schema never declares — the indexed field is plural resellerIds. A relationship built from this example can't resolve its foreign key.

Both found by a cross-model (Codex) review on HarperFast/skills#70, which regenerates its rules from this repo — this PR fixes the source so a future regen picks up the correction.

A third finding from that review — recommending allowReadRecord over allowRead for record-scoped authorization in the vector-indexing guide — was not applied: allowReadRecord doesn't exist in Harper's actual codebase, and a synchronous allowRead override already is the correct record-scoped hook (confirmed against resources/Resource.ts). That doc example was correct as written.

Test plan

• Diffed against the exact commit skills#70 was regenerated from (c5be2f9) to confirm both fixes land in the right source location.
• Verified delay is a real node:timers/promises import (returns a Promise) in both affected code blocks.
• Verified the schema block only declares resellerIds (plural), confirming resellerId in the relationship directive was a typo, not an intentional alias.
• Docs-only change; no build/test suite applicable beyond the above manual verification.

[gemini-code-assist]

Code Review

This pull request corrects a relationship field reference in the REST querying documentation and adds missing await keywords to delay calls in the v5 migration guide examples. The review feedback correctly identifies a missing import for transaction in one of the migration guide code examples, which should be added to make the example fully functional.

[gemini-code-assist]

In this code example, transaction is used on line 95 but is not imported from 'harper' on line 87 (which only imports getContext). To ensure the example is fully functional and copy-pasteable, please update the import statement on line 87 to include transaction:

import { getContext, transaction } from 'harper';

[github-actions]

🚀 Preview Deployment

Your preview deployment is ready!

🔗 Preview URL: https://preview.harper-documentation.harperfabric.com/pr-589

This preview will update automatically when you push new commits.

[heskew]

The two fixes are right (resellerIds resolves the FK mismatch; await delay(100) fixes both polling loops). One gap remains in this same example — left inline.

_{🤖 Draft prepared with Claude (cross-model review pipeline); reviewed and posted by @heskew.}

[heskew]

This example calls transaction(...) but it isn't imported — the import on line 87 only brings in getContext, so the snippet isn't copy-pasteable as written (same gap gemini flagged). Suggest:

import { getContext, transaction } from 'harper';