Round to 9 decimal places for formulas w/o a user-set decimal places

[ddimaria]

Addresses #877

• Round to 9 decimal places when user hasn't set decimals for Formulas
• Round to 9 decimals places in the summary, no trailing zeros

[vercel]

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Name	Status	Preview	Updated (UTC)
quadratic	✅ Ready (Inspect)	Visit Preview	Nov 28, 2023 8:19pm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (67887e5) 88.16% compared to head (e2ae59b) 88.18%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #893      +/-   ##
==========================================
+ Coverage   88.16%   88.18%   +0.02%     
==========================================
  Files          99       99              
  Lines       17317    17327      +10     
==========================================
+ Hits        15267    15280      +13     
+ Misses       2050     2047       -3     

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[davidkircos]

Bottom bar still shows too many decimals for sum. Everything else appears to work as expected!

[ddimaria]

Bottom bar still shows too many decimals for sum. Everything else appears to work as expected!

This is resolved. The frontend was forcing a decimal size, now rounding happens in Rust, though significant digits are supplied by TS.

[davidkircos]

sum and average show more than 9 decimals

[ddimaria]

There was an issue in the summary where we convert to a f64 after rounding that introduced unwanted behavior.....because floats. I added a round function for working directly f64s to mitigate this.