Add funding account visibility to Payments view

Problem Statement:

• The Payments view shows upcoming task payments but doesn't indicate which bank account the funds will be withdrawn from
• This makes it difficult to verify sufficient funds are available before payments are processed
• Also creates challenges for bookkeeping and financial tracking

Current Workaround:

• Manually checking each task in Operations → Task management to see the assigned bank account
• Cross-referencing with Settings → Payments & Payouts → Charges after the fact

Impact:

• Risk of insufficient funds if account balance isn't verified in advance
• Extra manual effort for bookkeeping and reconciliation
• No proactive visibility into funding sources

Proposed Solution:

• Display the funding bank account directly in the Payments view alongside upcoming task payments

Unlock:

• Hosts can proactively verify sufficient funds are available in the correct account
• Simplified bookkeeping with clear visibility into which account funded each payment