aiohttp follows 307 redirects but converts POST to GET, silently
dropping the request body. Standardize all @router.post('') to
@router.post('/') so the canonical URL always has a trailing slash,
preventing 307 redirects when clients POST with trailing slashes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The team_abbrev filter uppercased input but compared against mixed-case
DB values (e.g. "MKEMiL"), causing affiliate roster transactions to be
silently dropped from results. Use fn.UPPER() on the DB column to match.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
