feat: 增加公开业务 Agent 目录 (#108)

## 摘要

新增 7 个公开、可复用的 listing-only Agent 条目：

- 内容营销 Agent
- 标书协作 Agent
- 合同审查 Agent
- 工程图校核 Agent
- 检验报告 Agent
- 研究证据 Agent
- 流程运营 Agent

这些条目用于发现和展示能力蓝图，不声明已安装、已连接外部系统或可替代专业人员签发。工程、检验、法律和研究类条目均保留人工复核边界。

## Summary

Add seven public, reusable, listing-only Agent entries for content
marketing, tender collaboration, contract review, engineering drawing
review, inspection reports, research evidence, and workflow operations.

The entries are discovery blueprints only. They do not claim installed
tools, connected systems, or authority to replace qualified professional
review and sign-off.

## 数据变更 / Data changes

- Market version: `1.3.0`
- Agent count: `1 → 8`
- Every Agent includes bilingual legacy metadata and `CatalogItemV1`
sidecar data
- All new entries remain `listing-only` with unknown license/platform
facts where evidence is absent

## 验证 / Validation

- i18n unit tests: 9/9
- catalog validator tests: 29/29
- collection generator tests: 4/4
- catalog validation: 0 errors
- i18n validation: 0 errors
- secret/private-key scan: 0 findings

agents/research-evidence-agent/agent.json

@@ -0,0 +1,30 @@
+{
+  "id": "research-evidence-agent",
+  "name": "Research Evidence Agent",
+  "avatar": { "t": "研", "bg": "linear-gradient(135deg, #0369A1, #4F46E5)" },
+  "category": "research",
+  "version": "1.0.0",
+  "updatedAt": "2026-09-01",
+  "maintainer": { "name": "DesireCore Official", "verified": true },
+  "i18n": {
+    "default_locale": "en-US", "source_locale": "zh-CN", "locales": ["zh-CN", "en-US"],
+    "zh-CN": {
+      "name": "研究证据 Agent",
+      "shortDesc": "围绕研究问题收集资料、整理证据等级，并生成可回到原文的结论摘要",
+      "fullDesc": "它会先把研究问题拆清楚，再从允许使用的资料源中收集文献和数据，记录作者、出处、时间和引用位置。不同证据可以按团队规则分级，最后形成带引用的摘要与待确认问题。\n\n它不会把搜索结果冒充研究结论。涉及医学、法律或投资判断时，仍需相应专业人员复核。",
+      "tags": ["研究", "证据整理", "文献", "引用溯源"],
+      "persona": { "role": "研究证据 Agent", "traits": ["先定义问题", "出处完整", "区分证据强弱", "结论可回溯"] },
+      "translated_by": "human"
+    },
+    "en-US": {
+      "name": "Research Evidence Agent",
+      "shortDesc": "Collects material around a research question, organizes evidence strength, and produces summaries linked to the source text.",
+      "fullDesc": "It starts by clarifying the research question, then gathers literature and data from approved sources while recording authors, provenance, dates, and citation locations. Evidence can be graded using team-defined rules before producing a cited summary and a list of unresolved questions.\n\nSearch results are not presented as research conclusions. Medical, legal, and investment decisions still require qualified review.",
+      "tags": ["research", "evidence", "literature", "citations"],
+      "persona": { "role": "Research evidence agent", "traits": ["defines the question first", "keeps complete provenance", "distinguishes evidence strength", "makes conclusions traceable"] },
+      "translated_by": "ai:openai", "translated_at": "2026-09-01"
+    }
+  },
+  "persona": { "tools": [] },
+  "changelog": [{ "version": "1.0.0", "date": "2026-09-01", "changes": { "zh-CN": ["首次发布"], "en-US": ["Initial listing"] } }]
+}

agents/research-evidence-agent/catalog-metadata.v1.json

@@ -0,0 +1,19 @@
+{
+  "$schema": "../../schemas/catalog-metadata.v1.schema.json", "schemaVersion": 1,
+  "identity": { "kind": "agent", "id": "research-evidence-agent" },
+  "presentation": {
+    "defaultLocale": "en-US",
+    "i18n": {
+      "zh-CN": { "name": "研究证据 Agent", "summary": "围绕研究问题收集资料、整理证据等级，并生成可回到原文的结论摘要", "description": "它会先把研究问题拆清楚，再从允许使用的资料源中收集文献和数据，记录作者、出处、时间和引用位置。不同证据可以按团队规则分级，最后形成带引用的摘要与待确认问题。\n\n它不会把搜索结果冒充研究结论。涉及医学、法律或投资判断时，仍需相应专业人员复核。" },
+      "en-US": { "name": "Research Evidence Agent", "summary": "Collects material around a research question, organizes evidence strength, and produces summaries linked to the source text.", "description": "It starts by clarifying the research question, then gathers literature and data from approved sources while recording authors, provenance, dates, and citation locations. Evidence can be graded using team-defined rules before producing a cited summary and a list of unresolved questions.\n\nSearch results are not presented as research conclusions. Medical, legal, and investment decisions still require qualified review." }
+    },
+    "category": "research", "tags": ["research", "evidence", "literature", "citations"],
+    "icon": { "kind": "letter", "value": "研" }
+  },
+  "release": { "state": "known", "version": "1.0.0", "versionScheme": "semver" },
+  "timestamps": { "catalogUpdatedAt": { "state": "known", "value": "2026-09-01", "precision": "day" }, "releasePublishedAt": { "state": "unknown" }, "reviewedAt": { "state": "unknown" }, "upstreamObservedAt": { "state": "unknown" } },
+  "provenance": {},
+  "governance": { "stewardship": "official", "availability": "listing-only", "license": { "state": "unknown" }, "redistribution": "verify-package-terms", "listingMaintainer": { "name": "DesireCore Official", "verified": true } },
+  "compatibility": { "platforms": { "state": "unknown" } },
+  "spec": { "kind": "agent", "persona": { "role": "Research evidence agent", "traits": ["defines the question first", "keeps complete provenance", "distinguishes evidence strength", "makes conclusions traceable"] } }
+}