Fixtures

chore(deps): bump click 8.1.7 -> 8.2.1

## TL;DR

Routine click upgrade. Picks up the new `Context` generic typing
and a fix for boolean-flag short forms. One type hint adjusted in
`cli.py`. Lockfile regenerated; full unit suite green.

## Problem (WHY)

- click 8.2.x ships a typing fix flagged by mypy on Python 3.12.
- Staying on 8.1.7 means our type checks fail under the supported
  Python matrix.

The skill's anchor for cite-or-omit applies here too:
["Add what the agent lacks, omit what it knows"](https://agentskills.io/skill-creation/best-practices)
-- this PR body says only what the diff alone cannot.

## Approach (WHAT)

Mechanical. Bump version pin, regenerate lockfile, adjust one
type hint.

## Implementation (HOW)

| File | Change |
|---|---|
| `pyproject.toml` | `click = "^8.2.1"` (was `^8.1.7`). |
| `uv.lock` | Regenerated by `uv sync`. |
| `src/apm_cli/cli.py` | One type hint updated for new `click.Context` generic. |

## Trade-offs

- **Direct bump vs caret-locking to 8.1**: chose direct bump
  because the typing fix is the reason for the upgrade.

## Validation

```
$ uv sync --extra dev
resolved in 2.1s
$ uv run pytest tests/unit -x
2418 passed in 38.7s
```

## How to test

- [ ] `uv sync --extra dev`
- [ ] `uv run pytest tests/unit -x` (expect 2418 passing)
- [ ] `uv run mypy src/apm_cli` (expect 0 errors)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>