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

---

Note

Medium Risk
Changes lint output behavior by aggregating problems across multiple API entrypoints into a single report and adjusts markdown per-file totals, which could affect downstream tooling that parses these formats.

Overview
Fixes invalid structured output when linting multiple APIs by accumulating all problems/totals across the per-API loop and calling formatProblems once with a combined result set (including emitting partial results even if a later API errors).

Updates markdown formatting to show per-file error/warning counts instead of global totals, and adds/updates tests plus docs/changeset to reflect the new multi-API structured output behavior.

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[changeset-bot]

🦋 Changeset detected

Latest commit: a893ee5

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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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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