Fix resolving of CEL plugins for the file

[goccy]

• Consider the import path in the order of resolving file references
• Retrieve the list of CEL plugins used from the file

[github-actions]

Code Metrics Report

	main (a6f5e1d)	#279 (bd7cff9)	+/-
Coverage	65.4%	65.4%	+0.0%
Code to Test Ratio	1:0.3	1:0.3	-0.1
Test Execution Time	6m55s	7m4s	+9s

Details

  |                     | main (a6f5e1d) | #279 (bd7cff9) |  +/-  |
  |---------------------|----------------|----------------|-------|
+ | Coverage            |          65.4% |          65.4% | +0.0% |
  |   Files             |             78 |             78 |     0 |
  |   Lines             |          13833 |          13840 |    +7 |
+ |   Covered           |           9050 |           9059 |    +9 |
- | Code to Test Ratio  |          1:0.3 |          1:0.3 |  -0.1 |
  |   Code              |          42491 |          42503 |   +12 |
  |   Test              |          15932 |          15932 |     0 |
- | Test Execution Time |          6m55s |           7m4s |   +9s |

Code coverage of files in pull request scope (83.7% → 83.8%)

Files	Coverage	+/-
resolver/file.go	86.2%	-3.2%
resolver/resolver.go	83.7%	+0.2%

---

Reported by octocov

PR Overview

This PR fixes the resolution of CEL plugins by refactoring how they are retrieved from each file, ensuring that plugins are correctly gathered via the import file hierarchy and cached appropriately. Key changes include:

• Adding the AllCELPlugins function to the File type.
• Removing the old celPluginMap mechanism from Resolver.
• Updating Resolver methods (resolveFile, resolveService, and createCELEnv) to use the new AllCELPlugins function.

Reviewed Changes

File	Description
resolver/file.go	Introduces a public AllCELPlugins function to aggregate and sort plugins from the file and its imports.
resolver/resolver.go	Removes the celPluginMap caching, adjusts file caching logic, and updates service and environment resolution to use AllCELPlugins.

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.