Fix FinOps TDE recommendation on SQL Server 2019+

[erikdarlingdata]

Summary

• Fixes [BUG] FinOps Recommendations report no Enterprise-only features on servers with TDE-enabled databases #854 — FinOps Recommendations falsely reported "no databases use TDE" on SQL Server 2019, 2022, and 2025 even when TDE was enabled
• Root cause: sys.dm_db_persisted_sku_features correctly does not report TDE on 2019+ because TDE moved to Standard Edition in that release. The recommendation logic and messaging assumed TDE was always Enterprise-only.
• Added ProductMajorVersion check: on 2019+ (major version >= 15), skips the TDE-specific DMV check and instead shows version-appropriate guidance that most features are now available in Standard Edition
• Pre-2019 behavior is preserved unchanged

Test plan

• Verify on SQL 2019/2022/2025 Enterprise: recommendation shows "Enterprise Edition may not be required" with correct messaging
• Verify on SQL 2016/2017 Enterprise (if available): original TDE detection behavior still works
• Verify non-Enterprise editions skip the check entirely (existing behavior, unchanged)

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