feat(pi-permission-system): AutoReview 改为跟随主模型的对话式工具调用审查

AutoReview：

- 审查器回到 Codex Guardian 风格的对话式审查，默认跟随会话当前主模型
  （每次审查实时读取 ctx.model）；provider/model 必须同时设置才固定审查
  模型，只设其一视为配置错误并转人工。
- 结论只通过 approve / reject 两个工具给出，参数仅 reason；不强制
  toolChoice，正文文本（即使是合法 JSON）一律忽略。
- approve 自动放行；reject 转人工并在弹窗显示理由（标注模型生成）。
  超时、Provider 错误、截断、未调用工具、多次调用、参数无效等异常同样
  转人工，并附固定的系统说明；用户按 Esc 中止时直接拒绝。
- 模型调用改为 modelRegistry.streamSimple(...).result()：Pi 1.3.0 面向
  扩展的 ModelRegistry 没有 completeSimple，原写法在真实环境中每次都会
  转人工。
- 对话记录保留可信度标注；工具结果在有更短的 pi-compaction 摘要时替换
  为摘要；token 估算改为非 ASCII 字符按 1 token 计；预算可配置。
- 同一条用户消息内完全相同的请求只缓存 approve 结论。
- 默认 reasoning low、总超时 30 秒、最多 2 次尝试、maxOutputTokens 4000。

删除：

- 未发布过的 TypeSafe Jev 分类器实现、DenialCircuitBreaker。
- 整个 annotator 机制（model-explanation、注册表、registerAnnotator、
  provider-timeout）；annotators 配置键保留为已弃用并忽略，避免旧配置
  被拒绝。

测试：

- 新增 reviewer / transcript / 弹窗说明 / 默认配置测试；清理重复、恒真
  或只测实现细节的旧测试。
- 使用 deepseek-v4.1-flash 实测 5 个场景各 5 次，25 次结论全部符合预期。

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

pi-permission-system/test/handlers/gates/path.test.ts

@@ -118,32 +118,6 @@ describe("describePathGate", () => {
     expect(desc.preCheck?.state).toBe("deny");
   });
 
-  it("returns GateDescriptor when path check result is ask", () => {
-    const resolver = makeResolver(
-      makeCheckResult({ state: "ask", matchedPattern: "*.env" }),
-    );
-    const result = describePathGate(makeTcc(), resolver, normalizer);
-    expect(result).not.toBeNull();
-    expect(isGateDescriptor(result)).toBe(true);
-    const desc = result as GateDescriptor;
-    expect(desc.surface).toBe("path");
-    expect(desc.preCheck?.state).toBe("ask");
-  });
-
-  it("descriptor has correct session approval surface and pattern", () => {
-    const resolver = makeResolver(
-      makeCheckResult({ state: "ask", matchedPattern: "*" }),
-    );
-    const result = describePathGate(
-      makeTcc({ input: { path: "/test/project/src/.env" } }),
-      resolver,
-      normalizer,
-    ) as GateDescriptor;
-    expect(result.sessionApproval).toBeDefined();
-    expect(result.sessionApproval?.surface).toBe("path");
-    expect(result.sessionApproval?.representativePattern).toBeDefined();
-  });
-
   it("binds a current-directory file's session approval to the cwd subtree", () => {
     const resolver = makeResolver(
       makeCheckResult({ state: "ask", matchedPattern: "*" }),
@@ -171,6 +145,7 @@ describe("describePathGate", () => {
     expect(result.payload.kind).toBe("path");
     expect(result.payload.request.toolName).toBe("read");
     expect(result.payload.request.value).toBe(".env");
+    expect(result.payload.request.matchedPattern).toBe("*.env");
     expect(result.payload.request.requester.agentName).toBeNull();
   });
 
@@ -194,21 +169,6 @@ describe("describePathGate", () => {
     });
   });
 
-  it("emits a path payload naming the matched rule", () => {
-    const resolver = makeResolver(
-      makeCheckResult({ state: "ask", matchedPattern: "*.env" }),
-    );
-    const result = describePathGate(
-      makeTcc(),
-      resolver,
-      normalizer,
-    ) as GateDescriptor;
-
-    expect(result.payload.kind).toBe("path");
-    expect(result.payload.request.value).toBe(".env");
-    expect(result.payload.request.matchedPattern).toBe("*.env");
-  });
-
   it("descriptor decision uses surface 'path' and the file path as value", () => {
     const resolver = makeResolver(
       makeCheckResult({ state: "deny", matchedPattern: "*.env" }),