[SCRUM-14] Improve admin graph lazy loading UI

[vishalanandl177]

Summary

This PR updates the Django admin API log graphs so the changelist stays fast and the graph UI is less intrusive.

• Makes each existing admin graph individually collapsible.
• Fetches graph data only when that specific graph is opened.
• Adds admin-only chart-data endpoints that reuse the current filtered changelist queryset.
• Keeps graph cards horizontally full width and caps expanded graph height at 200px.
• Applies a 30 second timeout only to graph data fetches in the admin chart UI.
• Documents the lazy graph behavior and timeout.

Scope notes

• No model changes.
• No migrations.
• No package build or release publication.
• Existing unrelated untracked local files were left unstaged.

Validation

• python -m django test tests --settings=tests.test_settings --verbosity=1 - passed, 256 tests.
• python -m django test tests.test_admin_templates tests.test_admin_charts --settings=tests.test_settings --verbosity=2 - passed, 12 tests.
• python -m unittest tests.test_docs_content - passed, 12 tests.
• python -m django makemigrations drf_api_logger --check --dry-run --settings=tests.test_settings - no changes detected.
• python test_runner_simple.py - passed, 27 tests.
• git diff --check - passed.
• Explicit search for advanced-query model/migration identifiers returned no matches.
• Demo app J:\projects\drf-demo: current branch installed editable, manage.py check passed, collectstatic --noinput passed, rendered admin changelist confirmed lazy graph timeout, full width, and 200px height.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Enforce model permissions on chart data

When a logged-in staff user lacks the drf_api_logger.view_apilogsmodel permission, the normal changelist is blocked by Django's model-admin permission checks, but this custom endpoint is only wrapped in admin_site.admin_view and immediately builds the queryset. That lets any staff user fetch aggregate API-log volume/status/SQL data via /chart-data/.../ despite not being allowed to view API logs, so this view should check has_view_or_change_permission(request) before returning data.

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