## Why

`inventory/hosts.yml` contains real server IPs and usernames — it should not be tracked in git. The repository should ship a `.example` template that users copy and fill in.

## What Changes

- Rename `inventory/hosts.yml` to `inventory/hosts.yml.example` (tracked in git)
- Add `inventory/hosts.yml` to `.gitignore`
- Update README to document the copy step

## Capabilities

### New Capabilities

(none)

### Modified Capabilities
- `server-base`: Inventory file becomes a user-created instance from a template

## Impact

- `inventory/hosts.yml` gitignored (users create their own)
- `inventory/hosts.yml.example` committed as template
- README updated