Add comprehensive API documentation covering architecture, entities, and development workflow

[Copilot]

Creates complete documentation suite for the Express + SQLite API backend, addressing lack of developer onboarding materials and API reference documentation.

Documentation Structure

• api/README.md - Entry point with architecture overview, quick start, and configuration reference
• api/docs/database.md - Schema documentation for 8 tables with migrations system and seed data structure
• api/docs/models.md - TypeScript entity interfaces with relationships, field descriptions, and type safety patterns
• api/docs/endpoints.md - REST API reference for 40+ endpoints across 8 resources with request/response examples
• api/docs/repository-pattern.md - Data access layer patterns, CRUD operations, and testing strategies
• api/docs/development.md - Setup, testing, debugging, and deployment workflows

Key Additions

Architecture documentation:

Routes (API Layer)
    ↓
Repositories (Data Layer) ← Repository pattern with TypeScript interfaces
    ↓
SQLite Database ← Parameterized queries, camelCase ↔ snake_case mapping

Developer workflow coverage:

• Database initialization: npm run db:init --workspace=api
• Environment variables: DB_FILE, DB_ENABLE_WAL, DB_FOREIGN_KEYS, DB_TIMEOUT
• Repository usage pattern with factory functions and singleton instances
• Error handling with custom types (NotFoundError, ValidationError, ConflictError)

Integration with existing Swagger:

• Documentation references http://localhost:3000/api-docs
• Complements OpenAPI spec with usage examples and troubleshooting

Root README updated with organized documentation links under new API Documentation section.

Original prompt

start implementing issue 37

[Chronological Review: The conversation began with the user requesting to create an issue for documenting the backend. The context was set with the current date being February 5, 2026. The user provided no further details or specifications regarding the issue creation, leading to a straightforward request without additional context or requirements.]

[Intent Mapping: The explicit user request was to "create issue for documenting backend." This indicates a need for improved documentation regarding the backend of the project, likely to enhance clarity and maintainability.]

[Technical Inventory: The repository in context is named "copilot_agent_mode," owned by "webmaxru," with the current and default branch being "main." No specific technologies, frameworks, or architectural decisions were mentioned in the recent exchanges.]

[Code Archaeology: No specific files, functions, or code changes were discussed in the recent messages. The focus was solely on the request to create an issue.]

[Progress Assessment: The user has initiated a task to create an issue for backend documentation, but no further progress has been made on this task as of yet.]

[Context Validation: The request to create an issue for backend documentation is clear, and no additional context is needed to proceed with this task.]

[Recent Commands Analysis: The last agent command executed was a request to create an issue for documenting the backend. There were no tool results to summarize as the command was a straightforward request without execution of any tools or commands.]

1. Conversation Overview: - Primary Objectives: The user explicitly requested to "create issue for documenting backend." - Session Context: The conversation has focused on the user's request for backend documentation, with no additional context or details provided. - User Intent Evolution: The user's intent has remained consistent, focusing solely on the creation of an issue for backend documentation.

2. Technical Foundation:

• Repository: "copilot_agent_mode" (Owner: webmaxru, Branch: main)
• No specific technologies or frameworks were discussed in the recent exchanges.

3. Codebase Status:

• No specific files or code changes were mentioned in the recent conversation.

4. Problem Resolution:

• Issues Encountered: None reported in the recent exchanges.
• Solutions Implemented: Not applicable as no solutions were discussed.
• Debugging Context: No ongoing troubleshooting efforts were mentioned.
• Lessons Learned: No insights or patterns were discussed.

5. Progress Tracking:

• Completed Tasks: The user has initiated the task to create an issue for backend documentation.
• Partially Complete Work: The task is pending completion as no further actions have been taken.
• Validated Outcomes: No features or code have been confirmed working through testing.

6. Active Work State:

• Current Focus: The user was focused on creating an issue for backend documentation.
• Recent Context: The last few exchanges revolved around the request to create an issue without additional details.
• Working Code: No code snippets were discussed recently.
• Immediate Context: The specific task being addressed was the creation of an issue for backend documentation.

7. Recent Operations:

• Last Agent Commands: The last command was to create an issue for documenting the backend.
• Tool Results Summary: No tool results were generated as the command was a request without execution of any tools.
• Pre-Summary State: The agent was actively working on the user’s request to create an issue when the token budget was exceeded.
• Operation Context: The command was executed to fulfill the user's goal of improving backend documentation.

8. Continuation Plan:

• Pending Task 1: Create an issue for documenting the backend, with specific next steps to be defined based on user input.
• Priority Information: The task of creating the issue is the most urgent and logically sequential.
• Next Action: Immediate next step is to proceed with creating the issue as requested by the user.

Created from VS Code.

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