chore(security): scope scanner configs to production code

.semgrepignore

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+# Semgrep scan scope — production code only.
+# NOTE: this file OVERRIDES Semgrep's default ignore list; the built-in
+# defaults are carried forward below. Without this file (or without these
+# defaults), node_modules/, dist/, vendor/, build/, .git, etc. come back
+# into SAST scope and generate noise.
+# Docs: https://docs.semgrep.dev/ignoring-files-folders-code
+#
+# Managed by repo-configure skill (cribl-product-security). 2026-08-19.
+# --- Semgrep defaults (carry forward — do not remove) ---
+.git
+.svn
+.hg
+build/
+vendor/
+dist/
+*.min.js
+.env/
+.tox/
+node_modules/
+.npm/
+.yarn/
+.venv/
+__pycache__/
+
+# --- Repo-specific non-production paths ---
+test/

socket.yml

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+version: 2
+
+# Socket SCA scope configuration.
+#
+# In-scope (NOT listed below):
+#   - Root package.json (Node.js)
+#   - src/ (production code)
+#
+# Out-of-scope: see projectIgnorePaths below.
+# Socket always ignores .git, node_modules, coverage, dist — not repeated here.
+
+projectIgnorePaths:
+  - "test/**"