fix(cli): lint with multiple api files results in invalid output

[harshit078]

What/Why/How?

• Added logic to gather all lint results into allResults during per-file loop, then call formatProblems() once after with the combined totals.

Reference

#2692

Testing

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Check yourself

• This PR follows the contributing guide
• All new/updated code is covered by tests
• Core code changed? - Tested with other Redocly products (internal contributions only)
• New package installed? - Tested in different environments (browser/node)
• Documentation update has been considered

Security

• The security impact of the change has been considered
• Code follows company security practices and guidelines

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Note

Medium Risk
Changes lint output aggregation and finalization behavior, which may affect CI integrations consuming json/checkstyle/markdown output, especially on partial failures. Logic is localized and covered by new unit tests, reducing regression risk.

Overview
Fixes redocly lint when multiple API files are provided by accumulating all problems and totals across files and emitting a single formatProblems() result for non-ignore runs, ensuring structured formats like json/checkstyle produce a valid combined document (and still output partial results if a later file fails).

Updates markdown formatting to report per-file error/warning counts instead of global totals, adds unit tests for multi-API aggregation and failure cases, and refreshes the v1/v2 docs plus a patch changeset to reflect the new multi-API structured output behavior.

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🦋 Changeset detected

Latest commit: 545b1a0

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@redocly/cli	Patch
@redocly/openapi-core	Patch
@redocly/respect-core	Patch

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