chore: add P8-001 scratchpad

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/scratchpads/p8-001-sso-providers.md

@@ -50,13 +50,16 @@ Add WorkOS and Keycloak as optional SSO providers to the BetterAuth configuratio
 
 ## Quality Gate Results
 
-| Gate                | Status |
-| ------------------- | ------ |
-| typecheck           | ⏳     |
-| lint                | ⏳     |
-| format:check        | ⏳     |
-| test (@mosaic/auth) | ⏳     |
+| Gate                | Status                                       |
+| ------------------- | -------------------------------------------- |
+| typecheck           | ✅ 32/32 cached green                        |
+| lint                | ✅ 18/18 cached green                        |
+| format:check        | ✅ All matched files use Prettier code style |
+| test (@mosaic/auth) | ✅ 8/8 tests passed                          |
 
 ## Verification Evidence
 
-⏳ Pending
+- `pnpm typecheck` — FULL TURBO, 32 tasks successful
+- `pnpm lint` — FULL TURBO, 18 tasks successful
+- `pnpm format:check` — All matched files use Prettier code style!
+- `pnpm --filter=@mosaic/auth test` — 8 tests passed, 0 failed