Feat: metadata endpoint

[thekaveman]

Closes #510

Testing this PR

1. Checkout the branch locally, open in devcontainer
2. Reset the DB: flask drop-db then flask init-db
3. Confirm you see a record in the metadata table in the Sqlite database code -r /tmp/test.db
4. Launch the app with F5
5. Hit the /metadata endpoint, confirm output is as expected

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
eligibility_server
app.py
eligibility_server/db
models.py					11
setup.py
Project Total

This report was generated by python-coverage-comment-action

[thekaveman]

See #510 (comment) for why this is in Draft.

[thekaveman]

Getting an error in the infra pipeline:

Error: Error acquiring the state lock
│ 
│ Error message: state blob is already locked
│ Lock Info:
│   ID:        7af48bbd-8334-3356-becd-b6fe48e7a429
│   Path:      tfstate/terraform.tfstateenv:dev
│   Operation: OperationTypePlan
│   Who:       vsts@fv-az420-271
│   Version:   1.8.5
│   Created:   2024-12-20 20:34:46.015548148 +0000 UTC

It looks like during the key rotation last month, a state lock was made that was never released.

I'm going to manually release the lock:

terraform force-unlock 7af48bbd-8334-3356-becd-b6fe48e7a429

[angela-tran]

Tested this locally, and it looks good to me 👍