Add activity feed API

[sfc-gh-mkeller]

Please answer these questions before submitting your pull requests. Thanks!

1. What GitHub issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes SNOW-650716: SnowflakeCursor doesn't call _prefetch_hook() before yielding results of an execute_async() #1234

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am modifying authorization mechanisms
   • I am adding new credentials
   • I am modifying OCSP code
   • I am adding a new dependency

3. Please describe how your code solves the related issue.

   Creates a new Express.js server that serves mock activity feed data through a /feed endpoint. The server runs on port 3000 and returns a JSON array containing sample social media activities like photo uploads, comments, and status updates. This implementation adds the Express.js dependency to provide a REST API endpoint for the activity feed feature.

4. PR for stored-proc connector:

   N/A

[sfc-gh-mkeller]

• Add activity feed API #2153 👈 (View in Graphite)
• main

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