Problem

When users run @kody start-review on a PR that was already analyzed with no new changes, Kody provides no feedback, leaving users unsure if the command worked.

Current Behavior

• getChangedFilesSinceLastCommit() returns empty array when no changes
• Pipeline is set to SKIP status in FetchChangedFilesStage
• No user notification is provided

Expected Behavior

Add an informative comment explaining that the PR was already reviewed and no new changes were detected.

Technical Implementation

Files to modify:

• src/core/infrastructure/adapters/services/codeBase/codeReviewPipeline/stages/fetch-changed-files.stage.ts
• src/shared/utils/translations/dictionaries/en-US.json (and other languages)

Implementation Details:

• In FetchChangedFilesStage.executeStage(), distinguish between "no files" due to filtering vs. "no new changes"
• Check if lastExecution exists to determine if this is a re-review scenario
• Use commentManagerService.createInitialComment() to post feedback comment
• Include timestamp information when available

Message Template:

# Kody Review Complete ✅
**Info:** This PR has already been reviewed with no new changes detected.

If you've made new changes, ensure they're committed and pushed.

Acceptance Criteria

[ ] Re-reviews without changes receive explanatory comment
[ ] Comment includes relevant timestamp information
[ ] Distinguishes between "ignored files" and "no new changes" scenarios
[ ] All supported languages have translations
[ ] Works consistently across all supported platforms (GitHub, GitLab, Bitbucket, Azure Repos)