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/input-events.test.ts

@@ -68,7 +68,7 @@ describe("handleInput decision events — skill gate", () => {
     });
   });
 
-  it("emits allow with user_approved when state=ask and user approves", async () => {
+  it("emits a decision event on the escalate path", async () => {
     const { handler, events } = makeHandler({
       session: {
         checkPermission: makeSkillCheckPermission("ask"),
@@ -92,84 +92,4 @@ describe("handleInput decision events — skill gate", () => {
       resolution: "user_approved",
     });
   });
-
-  it("emits deny with user_denied when state=ask and user denies", async () => {
-    const { handler, events } = makeHandler({
-      session: {
-        checkPermission: makeSkillCheckPermission("ask"),
-      },
-      prompter: {
-        escalate: vi.fn<AskEscalator["escalate"]>().mockResolvedValue({
-          approved: false,
-          state: "denied",
-          decidedBy: DECIDED_BY_HUMAN,
-        }),
-      },
-    });
-    await handler.handleInput({ text: "/skill:explorer" }, makeCtx());
-
-    const decisions = getDecisionEvents(events);
-    expect(decisions).toHaveLength(1);
-    expect(decisions[0]).toMatchObject({
-      surface: "skill",
-      value: "explorer",
-      result: "deny",
-      resolution: "user_denied",
-    });
-  });
-
-  it("emits deny with confirmation_unavailable when state=ask but no UI", async () => {
-    const { handler, events } = makeHandler({
-      session: {
-        checkPermission: makeSkillCheckPermission("ask"),
-      },
-      prompter: {
-        escalate: vi.fn<AskEscalator["escalate"]>().mockResolvedValue({
-          approved: false,
-          state: "denied",
-          confirmationUnavailable: true,
-          decidedBy: DECIDED_BY_HUMAN,
-        }),
-      },
-    });
-    await handler.handleInput(
-      { text: "/skill:explorer" },
-      makeCtx({ hasUI: false }),
-    );
-
-    const decisions = getDecisionEvents(events);
-    expect(decisions).toHaveLength(1);
-    expect(decisions[0]).toMatchObject({
-      surface: "skill",
-      value: "explorer",
-      result: "deny",
-      resolution: "confirmation_unavailable",
-    });
-  });
-
-  it("emits allow with auto_approved when prompt returns autoApproved:true", async () => {
-    const { handler, events } = makeHandler({
-      session: {
-        checkPermission: makeSkillCheckPermission("ask"),
-      },
-      prompter: {
-        escalate: vi.fn<AskEscalator["escalate"]>().mockResolvedValue({
-          approved: true,
-          state: "approved",
-          autoApproved: true,
-          decidedBy: DECIDED_BY_HUMAN,
-        }),
-      },
-    });
-    await handler.handleInput({ text: "/skill:explorer" }, makeCtx());
-
-    const decisions = getDecisionEvents(events);
-    expect(decisions).toHaveLength(1);
-    expect(decisions[0]).toMatchObject({
-      surface: "skill",
-      value: "explorer",
-      result: "allow",
-      resolution: "auto_approved",
-    });
-  });
 });