Bump mio 1.1.1 -> 1.2.0

Bump uuid 1.22.0 -> 1.23.0

Use function index instead of location as the function id

Add tests for gradual-aware union narrowing

Add test demonstrating var snaphot+restore bug

Switch primer CI to release build

Clean up some unnecessary `mut`

Move validation of new upper bounds against existing lower bounds into `add_upper_bound`

Move validation of new lower bounds against existing upper bounds into `add_lower_bound`

Make `is_subset` closure passed to `add_bound` return the actual subset error instead of a bool

Tweak `add_{lower,upper}_bound` to allow the implementations to diverge more

Fix primer classifier miscounting errors across shards

Add blog post: Python Type Checker Comparison: Speed and Memory Usage

Preserve decorated function type through @wraps-style unions (#3107)

Add regression test for dict literal overload memory blowup