feat(experimentation): Snowflake warehouse connection support

[Zaimwa9]

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• I have read the Contributing Guide.
• I have added information to docs/ if required so people know about the feature.
• I have filled in the "Changes" section below.
• I have filled in the "How did you test this code" section below.

Changes

• Add config JSONField (nullable) and created status to WarehouseConnection model, enabling type-specific configuration storage
• Add SnowflakeConfig TypedDict in experimentation/types.py with defaults for all fields except account_identifier (required)
• Extend serializer with per-type config validation (Snowflake defaults merging, Flagsmith rejects config), writable name, and partial update support
• Add UpdateModelMixin to the ViewSet for PATCH support with audit logging

How did you test this code?

• 35 tests covering Snowflake creation, defaults, validation, resurrection, PATCH updates, and permissions

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[vercel]

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3 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs	Ignored		May 21, 2026 3:11pm
flagsmith-frontend-preview	Ignored		May 21, 2026 3:11pm
flagsmith-frontend-staging	Ignored		May 21, 2026 3:11pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-7565	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-7565	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-7565	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api:pr-7565	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-7565	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-7565	Finished ✅	Results ✅

[github-actions]

Playwright Test Results (oss - depot-ubuntu-latest-arm-16)

 1 passed

Details

 1 test across 1 suite
 37.1 seconds
 9cb6356
 🔄 Run: #16894 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-16)

 1 passed

Details

 1 test across 1 suite
 38.7 seconds
 9cb6356
 🔄 Run: #16894 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-arm-16)

 3 passed

Details

 3 tests across 3 suites
 42 seconds
 9cb6356
 🔄 Run: #16894 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-16)

 1 passed

Details

 1 test across 1 suite
 57 seconds
 9cb6356
 🔄 Run: #16894 (attempt 1)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.49%. Comparing base (b10a2c3) to head (9cb6356).

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #7565    +/-   ##
========================================
  Coverage   98.48%   98.49%            
========================================
  Files        1415     1417     +2     
  Lines       53595    53749   +154     
========================================
+ Hits        52785    52939   +154     
  Misses        810      810            

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[github-actions]

Visual Regression

19 screenshots compared. See report for details.
View full report