fix(Tagging): TagType evaluated incorrectly in database queries

[emyller]

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Changes

Contributes to #7433

Fixes a bug in which tag-based querying won't bring results because SQL is evaluated with non-str object representation, e.g. WHERE type = '<TagType.STALE>'.

Normalise TagType interfacing:

• TextChoices provides reliable ergonomics
• Tests are dumbimised and stick to bare value (ensures contract)

How did you test this code?

Running tests.

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3 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs	Ignored		Jun 25, 2026 9:27pm
flagsmith-frontend-preview	Ignored		Jun 25, 2026 9:27pm
flagsmith-frontend-staging	Ignored		Jun 25, 2026 9:27pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-7877	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-7877	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-7877	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api:pr-7877	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-7877	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-7877	Finished ✅	Results ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.61%. Comparing base (408f05b) to head (57938f8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7877      +/-   ##
==========================================
- Coverage   98.61%   98.61%   -0.01%     
==========================================
  Files        1486     1486              
  Lines       58301    58300       -1     
==========================================
- Hits        57495    57494       -1     
  Misses        806      806              

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[github-actions]

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

 2 passed

Details

 2 tests across 2 suites
 44.3 seconds
 57938f8
 🔄 Run: #17838 (attempt 1)

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

 1 passed

Details

 1 test across 1 suite
 42.4 seconds
 57938f8
 🔄 Run: #17838 (attempt 1)

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

 20 passed
 1 skipped

Details

 21 tests across 16 suites
 1 minute, 17 seconds
 57938f8
 🔄 Run: #17838 (attempt 1)

Skipped tests

firefox › tests/initialise-tests.pw.ts › Signup › Create Organisation and Project @oss

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

 2 passed

Details

 2 tests across 2 suites
 59.6 seconds
 57938f8
 🔄 Run: #17838 (attempt 1)

[github-actions]

Visual Regression

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

[khvn26]

LGTM!

Any other enums we should take care of? (doesn't have to be this PR, but having an issue would be nice if anything's left)

[emyller]

Any other enums we should take care of? (doesn't have to be this PR, but having an issue would be nice if anything's left)

Good call. Found a couple: #7878

There's a bunch of enums — not Choices — that could be refactored, but I intentionally left those out of right now.