Add autoblog webhook adapters

[authenticarc]

Summary

• add a core autoblog provider contract and contract-test runner
• add Outrank and CrawlProof autoblog adapters backed by vault-stored webhook URLs and optional HMAC signing secrets
• register the new autoblog category in the CLI adapter registry

Closes #210

Verification

• corepack pnpm --filter @profullstack/sh1pt-core typecheck
• corepack pnpm --filter @profullstack/sh1pt typecheck
• corepack pnpm --filter @profullstack/sh1pt-autoblog-outrank --filter @profullstack/sh1pt-autoblog-crawlproof typecheck
• corepack pnpm exec vitest run packages/autoblog/outrank/src/index.test.ts packages/autoblog/crawlproof/src/index.test.ts
• git diff --check

[ralyodio]

Heads up — the failing vu1nz security scan check needs a workflow fix that's on master (commit b3290b8). I tried to update this branch automatically but hit merge conflicts. Could you rebase/merge master locally, resolve conflicts, and force-push? Once that's in, the CI check will go green. Thanks!