Fix WHO-49 docs: refine Bank Link SDK integration guide wording

[rk111]

Summary by CodeRabbit

• Documentation
  • Clarified the Android integration guide for the Bank Link workflow.
  • Improved guidance on environment selection, including the default production setting.
  • Refined setup notes around matching environment and API key pairs.
  • Updated dependency installation instructions and credential-authentication details.
  • Reworded the App Link step to better explain browser-to-app return handling.
  • Revised the Bank Link Flow description to more clearly outline the full-screen, multi-step user experience.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: c2490599-6a51-4143-bcca-53089fc318f3

📥 Commits

Reviewing files that changed from the base of the PR and between 5fcf0aa and 8a56a4b.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

Five prose sections in README.md are reworded: the opening overview, environment configuration, dependency installation, OAuth App Link, and Bank Link Flow lead-in. No code, APIs, or exported entities are changed.

Changes

README Documentation Clarifications

Layer / File(s)

Summary

README integration guide rewrites README.md

Intro rewritten to name the Bank Link workflow and state the Android SDK mirrors the web SDK end-to-end; environment section rephrased to note a single build with runtime selection defaulting to production; dependency section updates token/credential wording and repositions the API-key pairing warning; OAuth App Link sentence reworded; Bank Link Flow lead-in rephrased to describe full-screen activity and four stages.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 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 accurately reflects the docs-only change and the wording refinements to the Bank Link SDK integration 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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/WHO-49-android-bank-link-sdk-integration-guide

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