docs(storage): document task_tracker backend config from #1949

[r266-tech]

Summary

Document the new storage.task_tracker.backend configuration field added in #1949 (zhoujh01 / MaojiaSheng, 2026-05-11T03:06:31Z, feat: Persist task tracker). Both docs/en/guides/01-configuration.md and docs/zh/guides/01-configuration.md currently have zero mention of task_tracker, so operators reading the configuration guide cannot discover the field or know to enable persistent for multi-instance deployments.

What's documented

• New ## storage.task_tracker Section (EN) / ## storage.task_tracker 段 (ZH) inserted adjacent to storage.transaction in each file
• JSON example with default backend: "memory" (preserves existing single-process behavior)
• Parameter table mirroring TaskTrackerConfig.backend (Literal["memory","persistent"], default "memory") verbatim from openviking_cli/utils/config/storage_config.py
• Brief operator guidance: when to flip to persistent (cross-instance task_id lookup or restart survival)

Description copy uses task_type naming (session_commit / add_resource / add_skill / admin_reindex) matching #1949 PR body. Limitations called out in the PR's "非目标" list (no auto-cleanup, no lease/heartbeat, no takeover, no CAS — last-write-wins) are deliberately NOT advertised as features.

Verification

# field & default verified against source
grep -nA3 'class TaskTrackerConfig' openviking_cli/utils/config/storage_config.py

# pre-flight sibling check (no competing PR)
gh search prs --repo volcengine/OpenViking --state open task_tracker

Notes

• 20 LOC additive across two files, pure docs
• Both EN and ZH follow the existing storage.transaction section template (lead sentence → JSON example → parameter table → usage hint)
• Default value "memory" is highlighted so single-instance operators upgrading do not feel pressured to flip the backend

[github-actions]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🎫 Ticket compliance analysis ✅ 1949 - Fully compliant Compliant requirements: Document the new storage.task_tracker.backend configuration field Include both English and Chinese documentation Show default value "memory" Explain when to use "persistent" backend

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

🏅 Score: 100

🧪 No relevant tests

🔒 No security concerns identified

✅ No TODO sections

🔀 No multiple PR themes

⚡ No major issues detected

[github-actions]

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