Memory updates: corrections, email triage, heartbeat state

- Updated corrections.md with config validation principles
- Email triage rules and logs
- Infrastructure ownership documentation
- Daily memory files through Feb 1
- Heartbeat state tracking
- Added .gitignore to exclude node_modules

.gitignore

@@ -0,0 +1,18 @@
+# Dependencies
+node_modules/
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Editor files
+*.swp
+*.swo
+*~
+
+# Logs
+*.log
+
+# Secrets (if any)
+.env
+*.key