Bound each provider's startFetch()/resolveFetch() to an optional
since/until window, wire a SQLite-backed ContributionStore into
ContributionAggregator (fetch only the trailing window past the last
stored date, merge into the store, prune by CONTRIBUTIONS_RETENTION_DAYS),
and add a graph:contributions:refetch command to force a full or ranged
re-fetch in <=365-day chunks. This is the root fix for the full
365-day-refetch timeout that used to hit on every cache miss.
Promoted readonly properties can't be reassigned in the constructor
body, so GitLabProvider and GiteaProvider threw on every instantiation.
Normalize the plain parameter first, then assign to a separately
declared readonly property.
Move all provider-related classes, enums, interface and trait into
App\Service\Provider; move SvgRenderer into App\Service\Renderer.
ContributionAggregator stays at the Service root as the orchestrator.
Test namespaces and use statements updated to match.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
haylan
