feat: architecture refactor — core layer, spreadsheet engine, envelope bidding, tests

- Add src/core/ (config, errors, events, http, observability, storage, query)
- Add src/Spreadsheet/ engine with native POI backend and Excel bridge
- Add Envelope C spreadsheet flow and tender bidding envelope modules
- Consolidate components into src/components/, remove legacy Component/ and Hooks/
- Add registration state/validation, auth session guard, profile edit modules
- Add unit tests across axios, redux, bidding, registration, encryption, core
- Add CI workflow, docs (architecture, audit, DSC API spec), keystore example
- Remove tracked keystore binary; ignore scripts.zip

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

babel.config.js

@@ -1,6 +1,13 @@
 module.exports = {
   presets: ['module:@react-native/babel-preset'],
-     plugins: [
-      'react-native-reanimated/plugin',
-    ],
+  plugins: [
+    // Must remain the LAST entry in this list.
+    'react-native-reanimated/plugin',
+  ],
+  env: {
+    // Release bundles: strip every console.* so no PII/debug output ships.
+    production: {
+      plugins: ['transform-remove-console'],
+    },
+  },
 };