Add growth state frontmatter to all 280 wiki files

TREE(74): training modules, entity profiles, 2890 references, keyword indices
SPROUT(42): knowledge pages, project docs, curated source material
SEED(164): daily notes, raw session logs, unprocessed material

Updated AUDIT_MANIFEST.json with growth classifications.

training/modules/first-robotics-overview.md

@@ -11,6 +11,7 @@ type: training-module
 track: entry
 owner: 2890
 
+growth: tree
 ---
 
 # FIRST Robotics — The Big Picture