docs: add redbark hosting guide

[oscargws]

Follow-up to #2794. Adds a setup guide for the Redbark provider at docs/hosting/redbark.md, same shape as the plaid guide: creating an account, getting an API key, adding it under Settings > Providers, and how syncing behaves (initial backfill, incremental lookback, dedup, the REDBARK_INCLUDE_PENDING toggle). Also adds Redbark to the provider integrations list in the onboarding guide.

Docs only, no code changes.

Summary by CodeRabbit

• Documentation
  • Added setup and troubleshooting guidance for connecting Redbark to Sure.
  • Documented account synchronization, transaction imports, pending transaction handling, and API key requirements.
  • Added Redbark to the onboarding guide’s list of supported integrations.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 96e12065-c413-4a61-be00-dc410486cbf4

📥 Commits

Reviewing files that changed from the base of the PR and between c9a28e1 and 47b39f5.

📒 Files selected for processing (2)

• docs/hosting/redbark.md
• docs/onboarding/guide.md

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📝 Walkthrough

Walkthrough

Adds documentation for configuring and using the Redbark integration, including synchronization and troubleshooting details, and lists Redbark among the onboarding integration options.

Changes

Redbark integration documentation

Layer / File(s)	Summary
Redbark setup and synchronization documentation docs/hosting/redbark.md	Documents account and API key setup, provider linking, synchronization windows, balance updates, transaction deduplication, pending transaction handling, and troubleshooting.
Onboarding integration listing docs/onboarding/guide.md	Adds Redbark as an Australian banks integration option.

Estimated code review effort: 1 (Trivial) | ~5 minutes

🚥 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 clearly and concisely summarizes the main change: adding a Redbark hosting guide.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 47b39f5d59

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[chatgpt-codex-connector]

Qualify pending replacement behavior

This overstates what the importer can guarantee when REDBARK_INCLUDE_PENDING is enabled: Redbark rows are imported without a provider-supplied pending_transaction_id, so the shared adapter only auto-claims a settled transaction via the fallback exact amount/currency/date-window match (app/models/redbark_account/transactions/processor.rb, app/models/account/provider_import_adapter.rb). If the bank changes the amount or details when the pending transaction posts, users can still end up with both entries rather than an automatic replacement, so the guide should warn that reconciliation is best-effort and duplicates may need review.

Useful? React with 👍 / 👎.

[jjmata]

Docs-only addition, follows the existing docs/hosting/plaid.md shape (account setup → API key → Settings > Providers → sync behavior → troubleshooting) and correctly cross-links from the onboarding guide's provider list. Nothing to flag.

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