初始化 Makelore 项目协作文档

需求：为客户端修复任务建立独立 worktree 所有权与项目记忆门禁。

实现：引入标准 .project-docs 模板，不修改现有客户端业务代码。

.project-docs/05-agent-entry/concurrent-task-gate.md

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+# Concurrent Task Gate
+
+Complete this gate before the Planning Gate.
+
+## Invariants
+
+- One active task owns one worktree.
+- Concurrent tasks use different branches and worktrees.
+- Never stash, reset, move, delete, or adopt unknown work automatically.
+- Feature tasks write only their own task record and uniquely named supporting records.
+
+## Required Output
+
+- Task ID:
+- Mode: Feature | Integration
+- Branch:
+- Worktree:
+- Base commit:
+- Ownership result: Claimed | Resumed | Isolated | Blocked
+- Other active local tasks:
+
+## Block Conditions
+
+- The worktree belongs to another active task and isolation did not succeed.
+- An unowned worktree contains staged, unstaged, or untracked changes.
+- No reliable committed base was selected for a new worktree.
+- The runtime cannot keep later Git and file operations rooted in the isolated worktree.