[Tech Debt] Refactor quoting service to use central-services-shared functions for endpoint lookup

[oderayi]

Summary:
Quoting service currently implements participant endpoint lookup logic that interacts directly with central-ledger's database. This functionality already exists in central-services-shared. Quoting service needs to be refactored to use the implementation in central-services-shared to remove this duplication.

Severity:
Low

Priority:
Low

Expected Behavior
Quoting service should perform participant endpoint lookups using central-services-shared functions.

Steps to Reproduce
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Specifications

• Component (if known): quoting-service
• Version: v15.7.3
• Platform:
• Subsystem:
• Type of testing:
• Bug found/raised by: @oderayi

Notes:

• Severity when opened: Low
• Priority when opened: Low