FINERACT-848: Add ability to define custom interest rate in fixed and recurring deposit accounts

[Eyad-Sharkawy]

Description

Resolves FINERACT-848.

Adds the ability to override product-level interest rate charts with a custom nominal annual interest rate for Fixed Deposit (FD) and Recurring Deposit (RD) accounts:

• Added isRateChartOverridden boolean flag to deposit account terms and data models.
• Updated domain interest calculation and validation in FixedDepositAccount and RecurringDepositAccount so that when isRateChartOverridden is enabled, custom nominal annual interest rate takes precedence and bypasses product chart slab lookups.
• Added API request/response parameters, Swagger documentation annotations, and Liquibase database migration.
• Added comprehensive unit tests in DepositAccountRateChartOverriddenTest.

Checklist

• Write the commit message as per our guidelines
• Acknowledge that we will not review PRs that are not passing the build ("green")
• Create/update unit or integration tests for verifying the changes made
• Follow our coding conventions
• Add required Swagger annotation and update API documentation
• This PR must not be a "code dump"
• If merging this PR resolves a JIRA issue, I will mark that issue as resolved and set "Fix Version/s" appropriately

[Eyad-Sharkawy]

Hi @Aman-Mittal / reviewers, all 86 test and quality checks passed, but the regression-safety check was cancelled on the baseline step (Instance #1: The operation was canceled). Could someone with write permissions please re-run that failed job? Thank you