FINERACT-2301: Migrate client collateral management to CommandDispatcher

[avivijay19]

Replace untyped CommandWrapper/JsonCommand/PortfolioCommandSourceWritePlatformService with typed CommandDispatcher/Command/CommandHandler<REQ,RES> pipeline for client collateral CRUD operations.

• Add typed request/response DTOs for create, update, delete
• Add Command classes and CommandHandler implementations with Resilience4j retry
• Create new ClientCollateralManagementWriteService (no JsonCommand dependency)
• Rename ReadPlatformService to ReadService (drop PlatformSecurityContext)
• Update API resource to use CommandDispatcher with typed returns
• Add URL-based security matchers in SecurityConfig
• Add Resilience4j retry config in application.properties
• Update Spring bean wiring in CollateralManagementConfiguration
• Delete old CommandType handlers, WritePlatformService, Swagger class, and unused request record DTOs

Description

Describe the changes made and why they were made. (Ignore if these details are present on the associated Apache Fineract JIRA ticket.)

Checklist

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