feat: set operation name also with persistent queries

[alepane21]

@coderabbitai summary

Checklist

• I have discussed my proposed changes in an issue and have received approval to proceed.
• I have followed the coding standards of the project.
• Tests or benchmarks have been added or updated.
• Documentation has been updated on https://github.com/wundergraph/cosmo-docs.
• I have read the Contributors Guide.

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[github-actions]

Router image scan passed

✅ No security vulnerabilities found in image:

ghcr.io/wundergraph/cosmo/router:sha-e1641db22869319ed8f5650ab8ad598a2f234eca

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 61.80%. Comparing base (177c11d) to head (8cb58cb).

Files with missing lines	Patch %	Lines
router/core/operation_processor.go	50.00%	7 Missing and 4 partials ⚠️

❌ Your patch check has failed because the patch coverage (50.00%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##            main    #2480       +/-   ##
==========================================
+ Coverage   1.50%   61.80%   +60.30%     
==========================================
  Files        292      229       -63     
  Lines      46748    23877    -22871     
  Branches     431        0      -431     
==========================================
+ Hits         703    14757    +14054     
+ Misses     45762     7861    -37901     
- Partials     283     1259      +976     

Files with missing lines	Coverage Δ
router/core/operation_processor.go	83.62% <50.00%> (ø)

... and 520 files with indirect coverage changes

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