### Motivation
- Provide a lightweight management command to estimate realistic daily translator throughput by analyzing change history while avoiding noisy data (bots, bulk uploads, automated events and obvious outliers).
- Make the analysis usable for projects/components/languages and bounded by date ranges for operational planning and reporting.

### Description
- Add `weblate/trans/management/commands/analyze_translator_work.py` which groups unit-backed changes by user/day (actions: `CHANGE`, `NEW`, `ACCEPT`), filters to active non-bot users, and computes median/average/p75/p90 for translated strings and source words.
- Add command options: `--days`, `--since`, `--until`, `--project`, `--component`, `--language`, `--min-changes`, `--max-changes`, and `--max-words` to scope and filter results.
- Update documentation at `docs/admin/management.rst` to document the new command and add a changelog note in `docs/changes.rst` announcing the feature.

### Testing
- `python -m compileall weblate/trans/management/commands/analyze_translator_work.py` completed successfully.
- `.venv/bin/python manage.py analyze_translator_work --help` ran and displayed the expected help text.
- `git diff --cached --check` passed with no problems reported for the changed files.
- `uv run prek run ruff --files ...` could not be executed due to an environment network restriction when initializing hooks (external hook repo cloning failed), and `uv run mypy ...` produced existing project-wide type findings unrelated to the new command file.

### Motivation

* Provide a way to estimate realistic daily translator throughput from change history while excluding bots, bulk imports, uploads and other outliers.

### Description

* Add new management command `analyze_translator_work` implemented in `weblate/trans/management/commands/analyze_translator_work.py` that aggregates change rows per user-day, filters by activity thresholds and outputs median/average/p75/p90 metrics for strings and source words per day.
* Command accepts arguments `--days`, `--since`, `--until`, `--project`, `--component`, `--language`, `--min-changes`, `--max-changes`, and `--max-words` and restricts the queryset to active human users and unit-backed changes.
* Document the new admin command in `docs/admin/management.rst` and add a release note entry in `docs/changes.rst`.
* Add unit test `AnalyzeTranslatorWorkTest` in `weblate/trans/tests/test_commands.py` (and adjust related imports) to validate grouping and reporting behavior for accepted suggestion changes.

### Testing

* Ran the Django unit tests including the new `AnalyzeTranslatorWorkTest` which invokes `call_command('analyze_translator_work', ...)`, and the test passed.
* Existing management command tests were exercised as part of the test run and completed successfully.