feat: expose the static cost to the middleware and configs

[ysmolski]

Integrate basic static cost calculation into the router.
Expose the static cost value in the modules.
Enable basic configuration of static cost via config options.

@coderabbitai summary

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

• 🔍 Trigger a full review

Tip

🧪 Unit Test Generation v2 is now available!

We have significantly improved our unit test generation capabilities.

To enable: Add this to your .coderabbit.yaml configuration:

reviews:
  finishing_touches:
    unit_tests:
      enabled: true

Try it out by using the @coderabbitai generate unit tests command on your code files or under ✨ Finishing Touches on the walkthrough!

Have feedback? Share your thoughts on our Discord thread!

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[github-actions]

Router image scan passed

✅ No security vulnerabilities found in image:

ghcr.io/wundergraph/cosmo/router:sha-fc48a524c0387ee084b56ab5caca50db7fcb18c8

[codecov]

Codecov Report

❌ Patch coverage is 23.68421% with 29 lines in your changes missing coverage. Please review.
✅ Project coverage is 29.71%. Comparing base (05dafc9) to head (f7eb41b).
⚠️ Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
router/core/operation_processor.go	27.77%	13 Missing ⚠️
router/core/context.go	0.00%	9 Missing ⚠️
router/core/executor.go	0.00%	2 Missing and 1 partial ⚠️
router/core/graphql_prehandler.go	0.00%	1 Missing and 1 partial ⚠️
router/core/websocket.go	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            main    #2470       +/-   ##
==========================================
+ Coverage   1.49%   29.71%   +28.21%     
==========================================
  Files        292      212       -80     
  Lines      46968    23282    -23686     
  Branches     431        0      -431     
==========================================
+ Hits         703     6918     +6215     
+ Misses     45982    15460    -30522     
- Partials     283      904      +621     

Files with missing lines	Coverage Δ
router/core/factoryresolver.go	57.41% <100.00%> (ø)
router/core/graph_server.go	57.86% <100.00%> (ø)
router/core/modules.go	5.26% <ø> (ø)
router/core/operation_planner.go	47.94% <100.00%> (ø)
router/pkg/config/config.go	7.79% <ø> (ø)
router/core/graphql_prehandler.go	41.04% <0.00%> (ø)
router/core/websocket.go	55.30% <0.00%> (ø)
router/core/executor.go	70.58% <0.00%> (ø)
router/core/context.go	34.02% <0.00%> (ø)
router/core/operation_processor.go	39.41% <27.77%> (ø)

... and 494 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[StarpTech]

We should work with modes here, enforce,measure to make it more explicit.

[StarpTech]

I recommend rethinking the interface we expose in the module for cost Operation().Cost(). To support more features in the future (dynamic costs), we should make it a struct.