Finalize Dexie-to-SQLite migration prep: docs, circular dep removal, SQL helpers, tests

- Removed all vestigial Dexie/USE_DEXIE_DB references from code and docs
- Centralized DB logic in PlatformServiceMixin; resolved logger/databaseUtil circular dependency
- Modularized SQL helpers (`$generateInsertStatement`, `$generateUpdateStatement`) and added unit tests
- Created/updated migration tracking docs and helper script for cross-machine progress
- Confirmed all lint/type checks and tests pass; ready for systematic file migration

package.json

@@ -132,6 +132,7 @@
     "@capacitor/assets": "^3.0.5",
     "@playwright/test": "^1.45.2",
     "@types/dom-webcodecs": "^0.1.7",
+    "@types/jest": "^30.0.0",
     "@types/js-yaml": "^4.0.9",
     "@types/leaflet": "^1.9.8",
     "@types/luxon": "^3.4.2",
@@ -156,6 +157,7 @@
     "eslint-plugin-prettier": "^5.2.1",
     "eslint-plugin-vue": "^9.32.0",
     "fs-extra": "^11.3.0",
+    "jest": "^30.0.4",
     "markdownlint": "^0.37.4",
     "markdownlint-cli": "^0.44.0",
     "npm-check-updates": "^17.1.13",
@@ -164,6 +166,7 @@
     "prettier": "^3.2.5",
     "rimraf": "^6.0.1",
     "tailwindcss": "^3.4.1",
+    "ts-jest": "^29.4.0",
     "typescript": "~5.2.2",
     "vite": "^5.2.0",
     "vite-plugin-pwa": "^1.0.0"