feat: add Curriculum Map link to README roadmap section

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: travisjneuman

README.md

@@ -74,6 +74,8 @@ The curriculum is a straight line from zero experience to production-grade engin
 
 **Total: 261 projects across 13 levels and 12 technology modules.**
 
+See the full [Curriculum Map](./CURRICULUM_MAP.md) for a dependency diagram and every project listed at a glance.
+
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 ## 📁 Project Levels