fix: Correct all relative paths in documentation

- Fix specification reference at top of file (use ./README.md)
- Fix related documentation section to use proper relative paths
- All paths now correctly relative to file location

Co-authored-by: tikazyq <[email protected]>

Author: Copilot

specs/20251031/001-database-architecture/PHASE2_IMPLEMENTATION.md

@@ -1,7 +1,7 @@
 # Phase 2 Implementation: Prisma Schema Updates for TimescaleDB
 
 **Date**: November 1, 2025  
-**Specification**: [specs/20251031/001-database-architecture/README.md](../../specs/20251031/001-database-architecture/README.md)  
+**Specification**: [README.md](./README.md)  
 **Status**: ✅ Complete
 
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@@ -322,8 +322,8 @@ _To be measured after production deployment_:
 
 - [Database Architecture Spec](./README.md) - Full specification
 - [Phase 1 Implementation](./IMPLEMENTATION_SUMMARY.md) - TimescaleDB setup
-- [Prisma Schema](/prisma/schema.prisma) - Updated schema file
-- [Migration File](/prisma/migrations/20251101000000_add_timescaledb_composite_indexes/migration.sql) - Index migration
+- [Prisma Schema](../../../prisma/schema.prisma) - Updated schema file
+- [Migration File](../../../prisma/migrations/20251101000000_add_timescaledb_composite_indexes/migration.sql) - Index migration
 
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