test: cover toCamelCase first_upper=True branch

[olitreadwell]

What changed

Add a unit test for toCamelCase(..., first_upper=True) (the PascalCase form).

Test only. No source change.

Why

toCamelCase has a first_upper argument, but no test exercised the first_upper=True branch.

A coverage run on naming.py reported exactly one missing line, line 82, which is that branch:

src/schematools/naming.py   25   1   6   1   94%   82

That branch is not dead code: schematools/types.py calls toCamelCase(self.id, first_upper=True) (lines 443 and 1305) to build class names from dataset and table ids. So the behaviour is worth locking down.

How to verify

uv sync --extra django
uv run pytest tests/test_naming.py \
  --cov=schematools.naming --cov-report=term-missing -q

Coverage

Before: naming.py 94% (line 82 missing) / After: naming.py 100%.

Checks run locally

• Tests: PASS (4 passed, 0 failed — tests/test_naming.py, re-verified during this audit with uv run pytest)
• Lint: PASS (uvx pre-commit run --files tests/test_naming.py: ruff, pyupgrade, django-upgrade, whitespace/EOF all pass, re-verified during this audit)
• Typecheck: N/A — this repo has no mypy/typecheck hook in CI or pre-commit
• Build: N/A — test-only change, no packaging impact

The full pytest suite needs PostgreSQL + GDAL, which the fork CI provides (postgis service container + gdal apt install). This change only touches the pure tests/test_naming.py, which needs neither.