FINERACT-1659: Add optimistic lock to savings interest posting batch …

[nickus]

…UPDATE

The root cause of duplicate interest postings was fixed in FINERACT-2394 (commit 5281be4), which removed a race condition where both the main thread and a fetchData callable concurrently populated a non-thread-safe ArrayDeque in PostInterestForSavingTasklet.

This commit adds defense-in-depth by wiring the existing @Version column into the raw JDBC batch UPDATE in SavingsSchedularInterestPoster, which bypasses JPA's optimistic lock. The batch UPDATE now includes AND version=? in its WHERE clause and version = version + 1 in SET. If a concurrent modification is detected (updateCounts[i] == 0), the account is skipped and logged rather than double-posted.

Changes:

• SavingsAccountData: add transient version field
• SavingsAccountReadPlatformServiceImpl: select sa.version and extract it in the ResultSetExtractor
• SavingsSchedularInterestPoster: add version check to batch UPDATE, skip accounts with version mismatch, filter downstream operations
• New integration test: testPostInterestJobRunTwiceSameDayNoDuplicate

Description

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

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