fix(deploy): trigger EC2 deploy on push to main instead of tags

[Lokesh7025]

Purpose / Description

Remove the dead deploy-dev workflow that was failing on every PR and update the production deploy to trigger on push to main instead of release tags.

Fixes

• Fixes the constantly failing "Deploy to EC2 (dev)" CI check that was blocking Renovate auto-merges

Approach

• Deleted deploy-dev.yml (pointed to a dead instance with invalid secrets)
• Changed deploy.yml trigger from tags to push to main
• Updated deploy script to pull main instead of checking out a tag

How Has This Been Tested?

SSH connection to the EC2 instance verified manually. Instance pulled latest main successfully.

Checklist

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)