Spectre + Stellar agent cookbook (3 production recipes)

[RemmyAcee]

Close: #28

Here's a summary of what was completed:

spectre-stellar-cookbook.mdx
— 869 lines, fully structured:

3 recipes × 6 steps each, all with SDK + curl examples
Recipe 1 (SaaS payments): agent creation → Friendbot/mainnet funding with cost tables → name resolution → notification polling with real payload parsing → weekly withdraw cron → privacy autopilot
Recipe 2 (DAO payroll): treasury agent → Contributor registry interface → runWeeklyPayroll with 30s inter-payment spacing → monitorAndRetry with 10-minute backoff → monthly rotation → pre-flight balance check scheduler
Recipe 3 (privacy monitor): monitoring agent → analyzePrivacy returning a typed PrivacyReport → Slack block-kit + SendGrid HTML reporters → auto-rotate plan generator → multi-agent weekly cron
Missing Features section — expanded from a summary table to 5 full issue writeups with proposed API shapes, risk descriptions, test cases, and workarounds. These are ready to paste directly into any issue tracker.

docs.json — guides/spectre-stellar-cookbook added to the Guides tab navigation.

[RemmyAcee]

Done, Close: #50

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