Add repository memory/speed audit and upgrade plan

[schartrand77]

Motivation

• Provide a focused performance and memory audit for the app/ backend (FastAPI + SQLModel) and app/static/app.js frontend so maintainers have prioritized, actionable recommendations to reduce CPU, network, and browser memory usage.

Description

• Add docs/performance_audit.md containing findings (refresh fan-out/report duplication, unbounded list APIs, potential N+1 relation loads, expensive client-side filtering/sorting, and DB/index opportunities) and a prioritized set of recommendations (single-pass report rendering, pagination and envelope responses, eager loading/lightweight DTOs, indexing/SQLite PRAGMA tuning, background sync/caching, HTTP caching, and observability suggestions).

Testing

• Ran python -m compileall app to validate the Python codebase compiled successfully.

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Codex Task

Summary by Sourcery

Documentation:

• Add a performance and memory audit document detailing current bottlenecks, recommended backend/frontend optimizations, and a suggested implementation order.

[sourcery-ai]

Reviewer's Guide

Adds a new performance and memory audit document for the StockWorks app, outlining current frontend/backend bottlenecks and a prioritized implementation plan for performance-related improvements.

Sequence diagram for optimized frontend refresh and single-pass report rendering

sequenceDiagram
    actor User
    participant UI as Browser_UI
    participant API as Backend_API

    User->>UI: Click Refresh
    UI->>UI: refreshAll()
    activate UI

    UI->>API: GET /materials?suppressReports=true
    UI->>API: GET /inventory?suppressReports=true
    UI->>API: GET /hardware?suppressReports=true
    UI->>API: GET /models?suppressReports=true

    API-->>UI: materials JSON
    API-->>UI: inventory JSON
    API-->>UI: hardware JSON
    API-->>UI: models JSON

    UI->>UI: Update in-memory stores
    UI->>UI: Debounced renderReports() (single call)
    UI-->>User: Updated dashboards and tables
    deactivate UI

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ER diagram for indexed inventory and movement relationships

erDiagram
    MATERIAL {
        int id PK
        string name
        string category
    }

    INVENTORYITEM {
        int id PK
        int material_id FK
        string location
        int quantity
    }

    STOCKMOVEMENT {
        int id PK
        int inventory_item_id FK
        datetime created_at
        int quantity_delta
    }

    HARDWAREITEM {
        int id PK
        string category
        string name
    }

    HARDWAREMOVEMENT {
        int id PK
        int hardware_item_id FK
        datetime created_at
        int quantity_delta
    }

    PRINTMODEL {
        int id PK
        string name
    }

    PRINTMODELSALE {
        int id PK
        int model_id FK
        datetime sold_at
        int quantity
    }

    MATERIAL ||--o{ INVENTORYITEM : has
    INVENTORYITEM ||--o{ STOCKMOVEMENT : tracks

    HARDWAREITEM ||--o{ HARDWAREMOVEMENT : tracks

    PRINTMODEL ||--o{ PRINTMODELSALE : sells

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File-Level Changes

Change	Details	Files
Introduce a written performance and memory audit with concrete recommendations and implementation order.	Document current frontend refresh behavior and recommend consolidating report rendering to a single pass with optional debouncing. Identify unbounded list endpoints and recommend paginated, envelope-style responses with indexed sorting. Describe potential N+1 relationship loading issues and suggest eager loading plus lightweight DTOs for list views. Highlight costly client-side filter/sort and full-table rerenders, recommending cached view-models, incremental DOM updates, and optional virtualization. Propose specific database indexes and SQLite PRAGMA tuning for better query performance. Outline performance-oriented feature upgrades: background sync + caching, materialized reporting tables, HTTP caching/conditional requests, observability instrumentation, and scale-ready API contracts. Provide a prioritized quick-win implementation order for the above recommendations.	docs/performance_audit.md

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Hey - I've reviewed your changes and they look great!

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