fix(phase-0): resolve import paths and add backward compatibility test

- Fix TypeScript import paths to use relative imports instead of aliases
- Add comprehensive backward compatibility test script
- Verify existing functionality works correctly:
  * Legacy /api/track endpoint: ✅
  * /api/v1/track POST endpoint: ✅
  * /api/v1/track GET endpoint: ✅
- Ready for Docker testing of new TypeScript implementation

node_modules/@redirect-intelligence/api

@@ -0,0 +1 @@
+../../apps/api

node_modules/@redirect-intelligence/database

@@ -0,0 +1 @@
+../../packages/database

node_modules/@redirect-intelligence/shared

@@ -0,0 +1 @@
+../../packages/shared

node_modules/@redirect-intelligence/web

@@ -0,0 +1 @@
+../../apps/web

node_modules/@redirect-intelligence/worker

@@ -0,0 +1 @@
+../../apps/worker