Bug: New deployment, account creation fails

Nobody has claimed this yet.

### Description

First-time user to Litestar. Testing by trying to deploy the fullstack demo.

Multiple failures requiring troubleshooting:

1. Postgres port in `.env.local.example` should match docker at `15432`
2. Inconsistencies between README.md and AGENTS.md (AGENTS.md doesn't include `app database upgrade`, and uses `uv run app run` instead of `app run`, which is correct?)
3. Tests fail out of the box, appears to be missing email templates

(3) Failed tests (`make test`):
```
Results (9.77s):
285 passed
11 failed
- src/py/tests/unit/lib/test_email_service.py:106 test_send_verification_email_without_name
- src/py/tests/unit/lib/test_email_service.py:200 test_verification_email_content_structure
- src/py/tests/unit/lib/test_email_service.py:171 test_send_password_reset_confirmation_email
- src/py/tests/unit/lib/test_email_service.py:140 test_send_welcome_email
- src/py/tests/unit/lib/test_email_service.py:274 test_template_caching
- src/py/tests/unit/lib/test_email_service.py:120 test_send_verification_email_url_construction
- src/py/tests/unit/lib/test_email_service.py:91 test_send_verification_email_with_name
- src/py/tests/unit/lib/test_email_service.py:223 test_verification_email_security_considerations
- src/py/tests/unit/lib/test_email_service.py:260 test_template_rendering
- src/py/tests/unit/lib/test_email_service.py:182 test_send_team_invitation_email
- src/py/tests/unit/lib/test_email_service.py:153 test_send_password_reset_email
337 error
✓ Tests passed ✨
```
(3) May be related: https://github.com/litestar-org/litestar-fullstack/issues/51

Found the below which referenced building email templates before CI tests so ran all the `make ...` commands I could find:
https://github.com/litestar-org/litestar-fullstack/pull/212/commits/32b77af684ab60ccf50b42f32ecf75fdbb5178b4
```
make build-emails
make build-assets
make build-wheel
```
Now I get (green) account creation success notification in-app and no apparent errors in console run output.

However, many more errors when running `make test`, most (all?) appear to be `TypeError: list indices must be integers or slices, not str`
```
$ make test
...
FAILED src/py/tests/integration/teams/services/test_team_service.py::test_get_nonexistent_team - TypeError: list indices must be integers or slices, not str
FAILED src/py/tests/integration/teams/services/test_team_service.py::test_create_team_empty_name - TypeError: list indices must be integers or slices, not str
FAILED src/py/tests/integration/teams/services/test_team_service.py::test_team_with_multiple_members_and_tags - TypeError: list indices must be integers or slices, not str

Results (8.82s):
296 passed
337 error
✓ Tests passed ✨
```

I'll update this as I find more while walking through quick start.

### MCVE

```python
make install
cp .env.local.example .env
make start-infra
app database upgrade
uv run app run
```

### Steps to reproduce

```bash

```

### Screenshots

_No response_

### Logs

```bash

```

### Package Version

```
Loading environment configuration from .env
Using Litestar Fullstack Template app from env: 'app.server.asgi:create_app'
Starting Granian server process with uvloop ──────────────────────────────────────────────────────────────────────────────────────────
┌──────────────────────────────┬────────────────────────────────────────────────────────┐
│ Litestar version │ 2.19.0 │
│ Debug mode │ Enabled │
│ Python Debugger on exception │ Disabled │
│ CORS │ Enabled │
│ CSRF │ Disabled │
│ OpenAPI │ Enabled path=/schema │
│ Compression │ Disabled │
│ Middlewares │ JWTCookieAuthenticationMiddleware, ViteProxyMiddleware │
└──────────────────────────────┴────────────────────────────────────────────────────────┘
• Applied Vite environment variables
✓ Types exported → openapi: src/js/web/src/lib/generated/openapi.json
• Starting Vite server with HMR
✓ Vite process started
2026-01-23T03:07:11.507215Z [info ] Starting granian (main PID: 25258)
2026-01-23T03:07:11.509451Z [info ] Listening at: http://0.0.0.0:8000
2026-01-23T03:07:11.511762Z [info ] Spawning worker-1 with PID: 25264
$ vite
✓ SPA handler initialized
2026-01-23T03:07:11.664248Z [info ] Discovered domain components by_domain={'accounts': ['AccessController', 'EmailVerificationController', 'MfaChallengeController', 'MfaController', 'OAuthAccountController', 'OAuthController', 'ProfileController', 'RoleController', 'UserController', 'UserRoleController'], 'admin': ['AdminTeamsController', 'AdminUsersController', 'AuditController', 'DashboardController'], 'system': ['SystemController'], 'tags': ['TagController'], 'teams': ['TeamController', 'TeamInvitationController', 'TeamMemberController']} controllers=19 repositories=0 schemas=63 services=12 signals=6
2026-01-23T03:07:11.665671Z [info ] Started worker-1
2026-01-23T03:07:11.665886Z [info ] Started worker-1 runtime-1
[litestar-vite] Configuration mismatch detected:
• bundleDir: vite.config.ts="home/static/dev-wsl/admin-portal/src/py/app/server/static/web" differs from Python="../../py/app/server/static/web"

Precedence: vite.config.ts > .litestar.json > defaults
See: https://docs.litestar.dev/vite/config-precedence

• Watching: openapi.json
• Generating TypeScript types...
• openapi-ts config: openapi-ts.config.ts
• Schema types (unchanged)
✓ TypeScript artifacts updated (1058ms)

VITE v7.3.1 ready in 1769 ms

➜ Local: http://localhost:3006/static/
➜ Network: http://10.255.255.254:3006/static/
➜ Network: http://172.18.100.8:3006/static/

LITESTAR 2.19.0

➜ Mode: SPA (index.html)
➜ App URL: http://localhost:8000 ✓
➜ Dev Server: http://localhost:3006
➜ Type Gen: src/lib/generated/
```

### Platform

- [x] Linux
- [ ] Mac
- [ ] Windows
- [ ] Other (Please specify in the description above)

Start by reproducing the setup with .env.local.example, README.md, AGENTS.md, and the listed make commands. Read src/py/tests/unit/lib/test_email_service.py and the integration team-service tests to separate the email-template failures from the TypeError failures. Done means the documented quick start works and the affected tests pass without the reported errors.

Written by the indexing model from the issue text.