harden(neuron-dev-setup): fix 7 fresh-Mac onboarding installer bugs (#99)

Co-authored-by: Neuron <will.anderson@neurontechnologies.ai>
Co-committed-by: Neuron <will.anderson@neurontechnologies.ai>

neuron-dev-setup/config.env.example

@@ -13,7 +13,8 @@ DEV_ROOT="${HOME}/Development/neuron-technologies"   # where source repos are cl
 GITEA_BASE="git@git.neuralplatform.ai:neuron-technologies"
 NEURON_REPO_URL="${GITEA_BASE}/neuron.git"          # soul + mcp-wrapper + mcp-proxy source
 ENGRAM_REPO_URL="${GITEA_BASE}/engram.git"          # engram memory substrate
-FOUNDATION_REPO_URL="${GITEA_BASE}/foundation.git"  # El SDK + forge (seed installer)
+# NOTE: there is no foundation.git repo. The El toolchain is fetched via
+# EL_TOOLCHAIN_SOURCE below; the forge seed installer is optional (Phase 6).
 NEURON_REPO_BRANCH="main"
 
 # ── Ports (must match across services; change only if a port clashes) ─────────
@@ -32,7 +33,9 @@ ENGRAM_API_KEY="ntn-dev-local"
 # ── El toolchain source (needed to build engram / mcp-wrapper / mcp-proxy) ────
 # Option A (default): fetch prebuilt El runtime + elc from GCP Artifact Registry
 #   (requires `gcloud auth` with access to project neuron-785695 — ask Will).
-# Option B: build El from the foundation/el checkout locally.
+#   Without gcloud the installer skips the El-dependent builds and still completes.
+# Option B: use a prebuilt El toolchain (elc + el_runtime.{c,h}) you have already
+#   staged in ${DEV_ROOT}/.el-runtime.
 EL_TOOLCHAIN_SOURCE="artifact-registry"   # artifact-registry | local
 GCP_PROJECT="neuron-785695"
 GCP_AR_REPO="foundation-prod"