[FEAT repo-guard] - Add spec.syncInterval per-resource to GithubTeam and GithubTeamRepository

[onuryilmaz]

User Story

As a platform operator, I want each resource to have its own sync interval, so that large orgs don't exhaust the GitHub API rate limit through simultaneous resyncs.

Description

All resources currently resync on the global interval. For large orgs, simultaneous resync exhausts the GitHub API rate limit.

Acceptance Criteria

• spec.syncInterval field added to GithubTeam and GithubTeamRepository CRDs
• Minimum value enforced: 5 minutes
• Falls back to global interval if unset
• Reconcilers respect per-resource interval

Reference Issues

N/A

[github-actions]

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