chore: add runtime artifacts to .gitignore and untrack them

Remove from index: daemon.pid, vectors.db, memory.db,
pending-insights.jsonl, session state, node_modules.
These are machine-specific runtime artifacts that should
never have been committed.

Co-Authored-By: claude-flow <ruv@ruv.net>

.gitignore

@@ -226,4 +226,18 @@ v1/src/sensing/mac_wifi
 #  exclude from AI features like autocomplete and code analysis. Recommended for sensitive data
 #  refer to https://docs.cursor.com/context/ignore-files
 .cursorignore
-.cursorindexingignore
+.cursorindexingignore
+
+# Claude Flow runtime artifacts (auto-generated, machine-specific)
+**/daemon.pid
+**/pending-insights.jsonl
+**/vectors.db
+**/memory.db
+**/.claude-flow/sessions/session-*.json
+**/.claude-flow/sessions/current.json
+
+# Node modules (should use npm ci, not committed)
+**/node_modules/
+
+# Local build scripts
+firmware/esp32-csi-node/build_firmware.bat