feat(ingest): T0.5–T5 純餵食器管線實作（issue #2）

ingest 全管線（採取優先、extract fallback、跨庫織網、POST envelope）：
- T0.5 骨架：Hono + zod-openapi，無 D1/Vectorize/AI 綁定（不碰儲存鐵律）
- T1 SourceAdapter：GitHub runtime API 拉 + per-file sha256 content-hash + /refresh 受理端
- T2 採取（路徑 A 優先）：harvest template 1.8.0+ 卡（gloss/實體/typed-edge）
- T3 extract（路徑 B fallback）：LlmCaller 可選模型 + JSON-fail 升級閘 + 端點對齊硬自檢護欄；第一版不 embed（只打標）
- T4 跨庫織網（主職）：匯總多 repo → 偵測跨庫橋/異見，不算 bridge_score（graph 領域）
- T5 輸出：buildEnvelope strict + 顯式禁送欄位自檢；graph-client 純 POST（cherry-pick _kbdb_client.py 改不碰 base）；薄 ops CLI（不帶查詢 MCP）

envelope 對齊 full contract（embed/id/aliases/predicate_embed）；同步 contract 向量化欄位升格。

gate：vitest 28 passed / tsc clean / wrangler dry-run 乾淨（只 env-var 綁定）。
端到端 ingest→graph：graph receiver 已補對齊 → 待 ingest 部署 + GRAPH_BASE_URL → 待部署驗，未假綠。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/weave.test.ts

@@ -0,0 +1,45 @@
+import { describe, it, expect } from 'vitest';
+import { weave, flattenForPost, type RepoEnvelopes } from '../src/lib/weave';
+import type { Envelope } from '../src/types';
+
+function env(uri: string, nodes: string[], triplets: Array<[string, string, string]>): Envelope {
+  return {
+    source: { uri, content_hash: uri },
+    extractor: { model: 'local-harvest', tier: 'shallow' },
+    nodes: nodes.map((n) => ({ name: n, embed: true })),
+    triplets: triplets.map(([s, p, o]) => ({ subject: s, predicate: p, object: o })),
+  };
+}
+
+const repos: RepoEnvelopes[] = [
+  { repo: 'o/repoA', envelopes: [env('github:o/repoA@x.md', ['Arcrun', '餵食器'], [['Arcrun', '包含', '餵食器']])] },
+  { repo: 'o/repoB', envelopes: [env('github:o/repoB@y.md', ['Arcrun', '圖層'], [['Arcrun', '依賴', '圖層']])] },
+];
+
+describe('weave', () => {
+  it('偵測跨庫橋（同名節點跨 ≥2 repo）', () => {
+    const r = weave(repos);
+    const bridge = r.bridges.find((b) => b.node === 'Arcrun');
+    expect(bridge?.repos).toEqual(['o/repoA', 'o/repoB']);
+    expect(r.totalTriplets).toBe(2);
+  });
+
+  it('偵測跨庫異見（同 s/o 對、不同謂詞跨 repo）', () => {
+    const diverge: RepoEnvelopes[] = [
+      { repo: 'o/repoA', envelopes: [env('github:o/repoA@x.md', ['X', 'Y'], [['X', '支持', 'Y']])] },
+      { repo: 'o/repoB', envelopes: [env('github:o/repoB@y.md', ['X', 'Y'], [['X', '反對', 'Y']])] },
+    ];
+    const r = weave(diverge);
+    expect(r.divergences.length).toBe(1);
+    expect(r.divergences[0].predicatesByRepo.map((p) => p.predicate).sort()).toEqual(['反對', '支持']);
+  });
+
+  it('flattenForPost 攤平所有 envelope（順序穩定）', () => {
+    expect(flattenForPost(repos).length).toBe(2);
+  });
+
+  it('ingest 不算 bridge_score（橋只標 repos，無分數欄位）', () => {
+    const r = weave(repos);
+    expect(r.bridges[0]).not.toHaveProperty('bridge_score');
+  });
+});