实现 IoT SIM 管理模块数据模型和数据库结构

- 添加 IoT 核心业务表：运营商、IoT 卡、设备、号卡、套餐、订单等
- 添加分佣系统表：分佣规则、分佣记录、运营商结算等
- 添加轮询和流量管理表：轮询配置、流量使用记录等
- 添加财务和系统管理表：佣金提现、换卡申请等
- 实现完整的 GORM 模型和常量定义
- 添加数据库迁移脚本和详细文档
- 集成 OpenSpec 工作流工具（opsx 命令和 skills）

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.claude/skills/openspec-new-change/SKILL.md

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+---
+name: openspec-new-change
+description: Start a new OpenSpec change using the experimental artifact workflow. Use when the user wants to create a new feature, fix, or modification with a structured step-by-step approach.
+---
+
+Start a new change using the experimental artifact-driven approach.
+
+**Input**: The user's request should include a change name (kebab-case) OR a description of what they want to build.
+
+**Steps**
+
+1. **If no clear input provided, ask what they want to build**
+
+   Use the **AskUserQuestion tool** (open-ended, no preset options) to ask:
+   > "What change do you want to work on? Describe what you want to build or fix."
+
+   From their description, derive a kebab-case name (e.g., "add user authentication" → `add-user-auth`).
+
+   **IMPORTANT**: Do NOT proceed without understanding what the user wants to build.
+
+2. **Select a workflow schema**
+
+   Run `openspec schemas --json` to get available schemas with descriptions.
+
+   Use the **AskUserQuestion tool** to let the user choose a workflow:
+   - Present each schema with its description
+   - Mark `spec-driven` as "(default)" if it's available
+   - Example options: "spec-driven - proposal → specs → design → tasks (default)", "tdd - tests → implementation → docs"
+
+   If user doesn't have a preference, default to `spec-driven`.
+
+3. **Create the change directory**
+   ```bash
+   openspec new change "<name>" --schema "<selected-schema>"
+   ```
+   This creates a scaffolded change at `openspec/changes/<name>/` with the selected schema.
+
+4. **Show the artifact status**
+   ```bash
+   openspec status --change "<name>"
+   ```
+   This shows which artifacts need to be created and which are ready (dependencies satisfied).
+
+5. **Get instructions for the first artifact**
+   The first artifact depends on the schema (e.g., `proposal` for spec-driven, `spec` for tdd).
+   Check the status output to find the first artifact with status "ready".
+   ```bash
+   openspec instructions <first-artifact-id> --change "<name>"
+   ```
+   This outputs the template and context for creating the first artifact.
+
+6. **STOP and wait for user direction**
+
+**Output**
+
+After completing the steps, summarize:
+- Change name and location
+- Selected schema/workflow and its artifact sequence
+- Current status (0/N artifacts complete)
+- The template for the first artifact
+- Prompt: "Ready to create the first artifact? Just describe what this change is about and I'll draft it, or ask me to continue."
+
+**Guardrails**
+- Do NOT create any artifacts yet - just show the instructions
+- Do NOT advance beyond showing the first artifact template
+- If the name is invalid (not kebab-case), ask for a valid name
+- If a change with that name already exists, suggest continuing that change instead
+- Always pass --schema to preserve the user's workflow choice