SKC App v1.8.20

What's Changed

• Assistant API and MCP server for bills, costing and pricing by @Pavaningithub in #5
• Add one-shot setup script for the assistant API by @Pavaningithub in #6
• Add recipe write route and raise the default margin target by @Pavaningithub in #7
• Send the API token in X-SKC-Token, not Authorization by @Pavaningithub in #8
• Give a useful error when the MCP env vars are missing by @Pavaningithub in #9
• Close admin PINs to clients; verify them server-side by @Pavaningithub in #10
• Give Firestore an identity: custom tokens for admins and agents by @Pavaningithub in #11
• Move storefront checkout server-side by @Pavaningithub in #12

New Contributors

• @Pavaningithub made their first contribution in #5

Full Changelog: v1.8.19...v1.8.20