harmonize project status codes for cercarbano

[andersy005]

@badgley, when you get a chance, i could use your help in harmonizing the project status codes for cercarbono.

offsets-db-data/offsets_db_data/projects.py

Line 233 in 35e72a9

def harmonize_status_codes(df: pd.DataFrame, *, status_column: str = 'status') -> pd.DataFrame:

the raw data contains the following status codes:

In [53]: df.stage.unique()
Out[53]: 
array(['Certified', 'Not assigned', 'Finished', 'Verification', 'Retired',
       'Cancelled', 'Validation', 'Rejected', 'Suspended',
       'Public comments'], dtype=object)