gracedb-2.26.0

Changes:

• Add VTInjection search (!196 (merged))
• Add option to disable alerts to search-specific topics (!197 (merged))
• Scitoken multi-issuer support (!198 (merged))
• Sentry monitoring reenabled across tiers (!195 (merged))
• Upgrade to Django 4.2 (!179 (merged))
• Add SVOM GRB external pipeline (!199 (merged))
• Support for CWB-BBH VOEvent generation (!149 (merged))