go build ./... names the binary after the module (gitea-heatmap-sidecar)
while the Dockerfile uses -o /heatmap. Fix .gitignore to match the local
name and add notes in both files explaining the discrepancy.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Extends the JSON response to include per-day repo names via
array_agg on action.repo_name, and surfaces them in the hover
tooltip below the contribution count.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>