fix: should skip region instead of failing

[gusfcarvalho]

No description provided.

[Copilot]

Pull request overview

This PR adjusts the AWS network diagnostics behavior so that unreachable AWS service endpoints no longer hard-fail an entire run. Instead, diagnostics are collected as warnings, concrete region lists are narrowed to reachable regions before running Cloud Custodian, and evaluation can continue to later checks while still returning aggregated diagnostic errors after evidence submission.

Changes:

• Change AWS endpoint network diagnostics from “fail-fast” to “warn + continue”, while still failing on invalid configured endpoints.
• Narrow aws_regions to only those with reachable service endpoints (and skip a check if all requested concrete regions are unreachable).
• Plumb diagnostic warnings through execution results and update tests to cover the new behavior (including evidence submission before returning diagnostic failures).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
README.md	Updates custodian_network_diagnostics behavior documentation to reflect warn/skip/narrow semantics.
main.go	Implements diagnostic result tracking, region narrowing/skip logic, and propagates diagnostic warnings into the Eval loop.
main_test.go	Updates/extends tests for diagnostics warn-and-continue, region filtering, and Eval behavior with diagnostic warnings.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.