Advanced analytics extension for SharpCoreDB.

Version: v1.9.1
Package: SharpCoreDB.Analytics

• ✅ Aligned package metadata and version references to the synchronized 1.9.1 release line.
• ✅ Release automation now publishes all packable SharpCoreDB packages in CI/CD.

• 100+ aggregate functions (COUNT, SUM, AVG, STDDEV, VARIANCE, PERCENTILE, CORRELATION)
• Window functions (ROW_NUMBER, RANK, DENSE_RANK, LAG, LEAD)
• Statistical and bivariate analysis helpers
• Time-series and OLAP-oriented helpers
• SIMD-friendly execution for high-throughput analytics workloads

• Package version synchronized to v1.9.0
• Analytics docs aligned with production feature set
• Inherits core durability/parser improvements from SharpCoreDB v1.9.0
• No intended breaking changes from v1.5.0

dotnet add package SharpCoreDB.Analytics --version 1.9.0

• docs/INDEX.md
• docs/analytics/README.md