Remove nano from docs, benchmark results, examples

[steven10a]

• Removed nano from the benchmark results
• Updated graphs to not include nano models
• Removed from any examples or code snippets in the docs

[Copilot]

Pull Request Overview

This PR removes references to deprecated "nano" model variants (gpt-4.1-nano and gpt-5-nano) throughout the codebase, replacing them with "mini" variants where appropriate. This appears to be a cleanup effort to deprecate support for these model versions.

• Removed gpt-4.1-nano and gpt-5-nano from the default benchmark models list
• Updated all example code and tests to use gpt-4.1-mini instead of gpt-4.1-nano
• Cleaned up documentation tables to remove nano model benchmark results

Reviewed Changes

Copilot reviewed 19 out of 23 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/guardrails/evals/guardrail_evals.py	Removed nano variants from DEFAULT_BENCHMARK_MODELS list and updated help text
src/guardrails/evals/README.md	Removed gpt-5-nano from example commands
src/guardrails/checks/text/jailbreak.py	Updated documentation example to use gpt-4.1-mini instead of gpt-4.1-nano
tests/integration/test_suite.py	Replaced all gpt-4.1-nano references with gpt-4.1-mini in test configurations
examples/implementation_code/streaming/*.py	Updated streaming examples to use gpt-4.1-mini
examples/implementation_code/blocking/*.py	Updated blocking examples to use gpt-4.1-mini
examples/basic/*.py	Updated all basic examples to use gpt-4.1-mini
docs/ref/checks/*.md	Removed nano model entries from performance benchmark tables and updated formatting
docs/evals.md	Removed gpt-5-nano from example command

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[gabor-openai]

TY!