chore: track go.work and the graphify map

go.work and go.work.sum were ignored, which left gopls without a
workspace root — the LSP needs them checked in to resolve ./backend.

graphify-out/ is meant to be committed so a fresh checkout starts with
the map instead of rebuilding. Committed: graph.json, graph.html,
manifest.json (portable now — relative keys, re-anchored on load),
GRAPH_REPORT.md, .graphify_labels.json, .graphify_root.

Still ignored: cost.json (local), cache/ (13M, regenerable), the dated
snapshot dirs (glob, so future ones are covered too), .rebuild.lock.

.graphify_python holds an absolute interpreter path, so it looks
machine-local — but it is tracked deliberately. Every query helper
shells $(cat graphify-out/.graphify_python), and an ignored untracked
file does not materialize in a new `git worktree add` dir, which would
break the first query in every new worktree. A second dev whose
interpreter differs should skip-worktree it locally.

.gitignore

@@ -5,13 +5,14 @@
 backend/server
 backend/backend
 .playwright-mcp/
-graphify-out/
+graphify-out/cost.json
+graphify-out/cache/
+graphify-out/[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]/
+graphify-out/.rebuild.lock
 plans/
 .scratch/
 docs/superpowers/
 .superpowers/
-go.work
-go.work.sum
 
 # impeccable-ignore-start
 # Ephemeral output, runtime state, and per-dev overrides.