fix(fill): proper handling custom receiver account

[krboktv]

Change Summary

What does this PR change?
There was a bug with order created with a custom receiver address. The maker_receiver account in such cases was not market is writable

Testing & Verification

How was this tested?

• Unit tests
• Integration tests
• Manual testing (describe steps)
• Verified on staging

Risk Assessment

Risk Level:

• Low - Minor changes, no operational impact
• Medium - Moderate changes, limited impact, standard rollback available
• High - Significant changes, potential operational impact, complex rollback