TAN-987: Update User and Session table to add createdAt (allow nulls …

[tahminator]

…for existing rows)

Description of changes

Checklist before review

• I have done a thorough self-review of the PR
• Copilot has reviewed my latest changes, and all comments have been fixed and/or closed.
• If I have made database changes, I have made sure I followed all the db repo rules listed in the wiki here. (check if no db changes)
• All tests have passed
• I have successfully deployed this PR to staging
• I have done manual QA in both dev (and staging if possible) and attached screenshots below.

Screenshots

Staging

simulated brand new login:

[pat-agent]

Available PR Commands

• /migrate - Applies this PR's database migrations to the staging DB (can only be run by someone on @Patina-Network/codebloom)
• /copy - Triggers copy from production to staging db (can only be run by tahminator or angelayu0530)

[tahminator]

/migrate

[tahminator]

/migrate

[tahminator]

/migrate

[pat-agent]

The image has been uploaded to https://hub.docker.com/r/patinanetwork/codebloom-standup-bot/tags under the following tags:

• codebloom-standup-bot:staging-latest
• codebloom-standup-bot:staging-2026.09.26-03.57.34
• codebloom-standup-bot:staging-572d32c

[pat-agent]

The image has been uploaded to https://hub.docker.com/r/patinanetwork/codebloom/tags under the following tags:

• codebloom:staging-latest
• codebloom:staging-2026.09.26-04.00.32
• codebloom:staging-572d32c

[tahminator]

/migrate

[sonarqubecloud]

Quality Gate passed for 'codebloom_frontend'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonarqubecloud]

Quality Gate passed for 'codebloom_backend'

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[pat-agent]

The image has been uploaded to https://hub.docker.com/r/patinanetwork/codebloom-standup-bot/tags under the following tags:

• codebloom-standup-bot:staging-latest
• codebloom-standup-bot:staging-2026.09.26-04.21.08
• codebloom-standup-bot:staging-ac27329

[pat-agent]

The image has been uploaded to https://hub.docker.com/r/patinanetwork/codebloom/tags under the following tags:

• codebloom:staging-latest
• codebloom:staging-2026.09.26-04.24.01
• codebloom:staging-ac27329