chore: Track .blue folder in git

- Track config, SQLite database, and docs
- Ignore transient WAL files (-shm, -wal)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.blue/config.yaml

@@ -0,0 +1,4 @@
+realm:
+  name: aperture
+  url: file:///Users/ericg/.blue/realms/aperture
+repo: blue

.blue/repos/blue/docs/spikes/2026-01-24-sqlite-storage-expansion.md

@@ -0,0 +1,17 @@
+# Spike: Sqlite Storage Expansion
+
+| | |
+|---|---|
+| **Status** | Complete |
+| **Date** | 2026-01-24 |
+| **Time Box** | 2 hours |
+
+---
+
+## Question
+
+What changes are needed to store spikes and plans in SQLite like RFCs, and store dialogue metadata (but not content) in SQLite?
+
+---
+
+*Investigation notes by Blue*

.gitignore

@@ -14,9 +14,7 @@ Cargo.lock
 .DS_Store
 Thumbs.db
 
-# Blue
-.blue/
-*.db
+# Blue SQLite WAL files (transient)
 *.db-shm
 *.db-wal