feat(API): Add make reset command for local development

[emyller]

Make it easier to run Flagsmith locally.

Changes

• Add make reset command that resets the database to a known state.
• Fix local server default settings.

make reset example

$ make reset
Flushing database...
Running migrations...
Creating cache table...
Seeding database with test data...

Database seeded successfully

Created entities:
  Organisation: Acme, Inc.
    Project: AI Booster
      Environments (3):
        Development
        Staging
        Production
      Features (6):
        dark_mode (FLAG, enabled)
        ai_assistant (FLAG, disabled)
        api_rate_limit (CONFIG)
        welcome_message (CONFIG)
        feature_config (CONFIG)
        beta_features (FLAG, enabled)
      Segments (3):
        Premium Users (with overrides)
        Beta Testers (with overrides)
        50% Rollout
      Identities (2):
        alice@example.com (with overrides)
        bob@example.com (with overrides)

Login credentials:
  Email: local@flagsmith.com
  Password: testpass1

Review effort: 2/5

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3 Skipped Deployments

Project	Deployment	Review	Updated (UTC)
docs	Ignored	Preview	Jan 6, 2026 1:46am
flagsmith-frontend-preview	Ignored	Preview	Jan 6, 2026 1:46am
flagsmith-frontend-staging	Ignored	Preview	Jan 6, 2026 1:46am

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-6459	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-6459	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-6459	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-6459	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-6459	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-6459	Finished ✅	Results ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.09%. Comparing base (38ac162) to head (a45b8b8).
⚠️ Report is 9 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6459      +/-   ##
==========================================
+ Coverage   98.07%   98.09%   +0.02%     
==========================================
  Files        1294     1295       +1     
  Lines       46535    46751     +216     
==========================================
+ Hits        45637    45862     +225     
+ Misses        898      889       -9     

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[emyller]

One thing I'd like to see before I approve it: the command hidden behind a Django setting toggle, off by default, overridden in settings/local.py.

Addressed in c05a9c5.

[cursor]

Missing testserver in ALLOWED_HOSTS for local settings

The reset_local_database command uses Django REST Framework's APIClient which makes requests with Host: testserver (Django's default for test clients). However, local.py only adds ".ngrok.io", "127.0.0.1", and "localhost" to ALLOWED_HOSTS, not "testserver". Since DEBUG defaults to False in common.py and isn't overridden in .env-local or local.py, Django will validate the Host header and reject all APIClient requests with a DisallowedHost exception. The tests pass because test.py both sets DEBUG = True and adds "testserver" to ALLOWED_HOSTS, but running make reset with local settings will fail.