Merge origin/main into local main. Keep both on the three conflicts.

v0-neuron is in this history. origin/main architecture and soul are in too. Sort later.

.gitattributes

@@ -1,2 +1,19 @@
 packages/core/migration/**/snapshot.json linguist-generated
 packages/core/src/database/migration.gen.ts linguist-generated
+# ---- keep both, sort later: local main (v0) then origin/main ----
+# ── Generated build artifacts ────────────────────────────────────────────────
+# dist/ holds elc transpiler output (*.c, *.elh) plus the generated decls header.
+# CI consumes these (the "Generate ELP master declarations header" step greps
+# dist/*.c), so they stay TRACKED. But they are machine-generated and must never
+# bloat a review. A single soul change regenerates dist/neuron.c + dist/soul.c =
+# ~57,000 lines of churn that buries the real ~few-hundred-line source diff and
+# poisons both human review and the agent review pipeline.
+#
+#   -diff               → git emits "Binary files differ" instead of the text diff
+#   linguist-generated  → Gitea collapses the file in the PR view + drops it from
+#                          language stats
+#
+# Net effect: PRs show only the real .el/source changes; the build is untouched.
+dist/**              -diff linguist-generated
+neuron-built         -diff linguist-generated
+dist/neuron          -diff linguist-generated