fix: route task and label operations to the configured tracker repo (#530)

[fujiwaranosai850]

Closes #530.

Summary

Fixes tracker-targeting drift so DevClaw uses the configured tracker repository instead of ambient checkout inference in task and label operation flows.

Changes

• route task creation to the configured tracker repo
• route label operations to the configured repo
• complete provider targeting across GitHub paths
• add regression coverage for provider targeting and tick-path behavior

Included commits

• e7bfcd4 fix: route task_create to configured tracker repo (test: add integration test skeleton for task_update tool #95)
• 6352a32 fix: route label operations to configured repo (test: add integration test skeleton for task_update tool #95)
• 5957979 fix: complete provider targeting across github paths (test: add integration test skeleton for task_update tool #95)

Testing

Added regression coverage in:

• lib/providers/provider-targeting.test.ts
• lib/services/tick-provider-targeting.test.ts
• lib/tools/helpers.test.ts

Notes

This PR is intentionally scoped to the tracker-targeting fix only.
A self-hosting doc change from the original local commit series was intentionally excluded from this upstream PR.

[fujiwaranosai850]

Closing this draft so the PR can be opened from the maintainer's own GitHub account using the same clean branch and content.