docs: add troubleshooting section for SAP LMS 403 errors

[mstrivens]

Add troubleshooting guidance for Authentication Flow 2 to help users resolve 403 errors when connecting SAP SuccessFactors accounts. The section emphasizes verifying the Company ID matches the learning domain URL, which is a common source of connection issues.

Fixes #360

Generated with Claude Code

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Summary by cubic

Added a troubleshooting section to the SAP SuccessFactors LMS connection guide to resolve 403 errors in Authentication Flow 2. It focuses on verifying the Company ID matches the Learning Domain URL and ensuring the URL is correctly formatted, addressing Linear issue #360.

^{Written for commit e5b90ab. Summary will update on new commits.}

[Copilot]

Pull request overview

This PR adds a troubleshooting section to the SAP SuccessFactors documentation to help users resolve 403 errors when connecting their accounts, specifically for Authentication Flow 2. The guidance focuses on verifying credentials, particularly the Company ID, which is identified as a common source of connection issues.

Key Changes

• Adds a new "Troubleshooting" section with specific guidance for 403 errors
• Provides step-by-step verification process for credentials, Company ID, and Learning Domain URL format
• Includes an example showing the relationship between Company ID and Learning Domain URL

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[Copilot]

The example provided here suggests the Company ID matches the subdomain in the Learning Domain URL (e.g., company123). However, this may be misleading when compared to the actual examples shown elsewhere in the document (lines 35 and 123), which use sfcpart000906.scdemo.successfactors.com/.

Consider using a more realistic example that aligns with the pattern shown in the screenshots, such as sfcpart000906, or clarify that the relationship between the subdomain and Company ID can vary. The current simplified example might cause confusion when users compare it to their actual URLs.

Suggested change

	The Company ID is a common source of connection issues. Ensure that the Company ID you entered matches the company ID in your Learning Domain URL.
	For example, if your Learning Domain URL is `https://company123.scdemo.successfactors.com/`, the Company ID should typically be `company123`.
	You can verify the Company ID by checking the value shown in your profile modal (accessible from the profile image in the upper right-hand corner).
	The Company ID is a common source of connection issues. In many environments, the Company ID corresponds to the company-specific part of your Learning Domain URL.
	For example, if your Learning Domain URL is `https://sfcpart000906.scdemo.successfactors.com/`, the Company ID is often `sfcpart000906`. However, this relationship can vary between tenants.
	Always verify the Company ID by checking the value shown in your profile modal (accessible from the profile image in the upper right-hand corner) and use that value if it differs from the URL.