wiki2md: use file modification for commit timestamps on article import

[pedrogaudencio]

Uses time of article file modification (upon being imported with wiki2md tool) as first commit timestamp upon Wikipedia article creation.

Following discussion in /pull/127 and @eighttrigrams's suggestion.

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 2 additional findings.

[Copilot]

Pull request overview

Updates the article-creator service to set the initial commit timestamp for imported Wikipedia articles based on the source Markdown file’s modification time (as produced by wiki2md), aligning repository history with when the article was fetched/written to disk.

Changes:

• Read the Markdown file’s filesystem modification time during import.
• Pass that timestamp into README creation and use it for the commit’s author/committer dates.

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[taoeffect]

Great work @pedrogaudencio! Minor suggestion from Opus 4.6, you can take it or leave it (let me know!)

Details

The change is small and straightforward. I found one concrete issue and one minor simplification.

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1. TOCTOU race and redundant syscall with os.Stat + os.ReadFile

• main.go:253-261 (the new os.Stat call) followed by main.go:263 (os.ReadFile)

You stat the file to get ModTime, then separately open and read it. This is two syscalls on the same path, and there's a window where the file could be modified or replaced between the stat and the read, giving you a stale ModTime for different content. Open the file once instead:

func (c *giteaClient) processFile(filePath, username string, public bool) bool {
	c.stats.processed++

	fmt.Printf("\nProcessing: %s\n", filepath.Base(filePath))

	// Open file once to get both content and modification time
	f, err := os.Open(filePath)
	if err != nil {
		fmt.Printf("  ✗ Failed to open file: %v\n", err)
		c.stats.failed++
		return false
	}
	defer f.Close()

	fileInfo, err := f.Stat()
	if err != nil {
		fmt.Printf("  ✗ Failed to stat file: %v\n", err)
		c.stats.failed++
		return false
	}

	content, err := io.ReadAll(f)
	if err != nil {
		fmt.Printf("  ✗ Failed to read file: %v\n", err)
		c.stats.failed++
		return false
	}

	// ... rest of function, using fileInfo.ModTime() ...

This also eliminates the need for the intermediate fileModTime variable at what is currently line ~284 — just pass fileInfo.ModTime() directly to createReadmeFile.

[taoeffect]

Excellent!