feat: add rolling stats, K-Means clustering, and hypothesis testing

feat: add box plot, correlation heatmap, and descriptive statistics

fix: resolve ModuleNotFoundError for tools.tools

feat: user-supplied API keys, model selector, and Anthropic support

updates to queries and tools for fewer errors

condense query functions

refactor chat functions

add secondary query function

first version of graphql integration

integration mongodb

review updates

first draft of sql integration

more refactor updates

refactor and visual updates