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/pathways/entry-path.md

@@ -8,6 +8,7 @@ tags:
 type: training-pathway
 track: entry
 owner: 2890
+growth: tree
 ---
 
 # Entry Path — Everyone Starts Here

training/pathways/index.md

@@ -1,6 +1,7 @@
 ---
 type: training-pathway
 date: 2026-05-03
+growth: tree
 ---
 
 # 2890 Training Pathways