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/skill-read.test.ts

@@ -77,32 +77,17 @@ describe("describeSkillReadGate", () => {
     expect(result).toBeNull();
   });
 
-  it("returns GateDescriptor with preResolved.state matching skill entry state (ask)", () => {
-    const result = describeSkillReadGate(makeTcc(), normalizer, () => [
-      makeSkillEntry({ state: "ask" }),
-    ]);
-    expect(result).not.toBeNull();
-    const desc = result!;
-    expect(desc.preResolved).toEqual({ state: "ask" });
-  });
-
-  it("returns GateDescriptor with preResolved.state matching skill entry state (allow)", () => {
-    const result = describeSkillReadGate(makeTcc(), normalizer, () => [
-      makeSkillEntry({ state: "allow" }),
-    ]);
-    expect(result).not.toBeNull();
-    const desc = result!;
-    expect(desc.preResolved).toEqual({ state: "allow" });
-  });
-
-  it("returns GateDescriptor with preResolved.state matching skill entry state (deny)", () => {
-    const result = describeSkillReadGate(makeTcc(), normalizer, () => [
-      makeSkillEntry({ state: "deny" }),
-    ]);
-    expect(result).not.toBeNull();
-    const desc = result!;
-    expect(desc.preResolved).toEqual({ state: "deny" });
-  });
+  it.each(["ask", "allow", "deny"] as const)(
+    "returns GateDescriptor with preResolved.state matching skill entry state (%s)",
+    (state) => {
+      const result = describeSkillReadGate(makeTcc(), normalizer, () => [
+        makeSkillEntry({ state }),
+      ]);
+      expect(result).not.toBeNull();
+      const desc = result!;
+      expect(desc.preResolved).toEqual({ state });
+    },
+  );
 
   it("decision surface is 'skill' and decision value is the skill name", () => {
     const result = describeSkillReadGate(makeTcc(), normalizer, () => [
@@ -123,15 +108,6 @@ describe("describeSkillReadGate", () => {
     });
   });
 
-  it("emits a skill_read payload keeping the skill as the decision value", () => {
-    const result = describeSkillReadGate(makeTcc(), normalizer, () => [
-      makeSkillEntry({ name: "my-skill" }),
-    ])!;
-
-    expect(result.payload.kind).toBe("skill_read");
-    expect(result.payload.request.value).toBe("my-skill");
-  });
-
   it("payload contains the skill name and the path it was reached through", () => {
     const result = describeSkillReadGate(makeTcc(), normalizer, () => [
       makeSkillEntry({ name: "librarian" }),
@@ -175,11 +151,4 @@ describe("describeSkillReadGate", () => {
       agentName: "agent-1",
     });
   });
-
-  it("surface is 'skill' on the descriptor", () => {
-    const result = describeSkillReadGate(makeTcc(), normalizer, () => [
-      makeSkillEntry(),
-    ])!;
-    expect(result.surface).toBe("skill");
-  });
 });