Add 2026 budget

[feydan]

The 2026 approved budget is available on the City of Sacramento open data portal: https://data.cityofsacramento.org/datasets/7b8b3680603c4894bd3faaa41c986c7c_0/explore

Steps to update the visualizations:

Flow diagram

1. Download the data file and overwrite it in this folder: https://github.com/opensacorg/openbudgetsac.org/tree/main/_src/data
2. Save 2026 data to the flow folder python split_csv.py City_of_Sacramento_Approved_Budgets.csv 2026 _src/data/flow --txf "lambda x: 'FY' + str(x)[-2:]"
3. Add a case for FY26 in https://github.com/opensacorg/openbudgetsac.org/blob/main/_src/js/flow.js#L145, it should match FY25.

Compare tool

Needs investigation/directions

Detail diagram

Needs investigation/directions