Scaffold LogicSRC and CommandBoard plugins

docs/data-model.md

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+# Data Model Draft
+
+Core tables:
+
+```txt
+users
+dids
+oauth_accounts
+profiles
+organizations
+organization_members
+boards
+board_members
+posts
+threads
+comments
+tasks
+task_bids
+task_submissions
+agents
+agent_capabilities
+agent_runs
+agent_run_logs
+payments
+escrows
+wallets
+reputation_events
+files
+api_keys
+permissions
+audit_logs
+webhooks
+notifications
+schemas
+schema_versions
+plugin_audit_logs
+```
+
+Important relationships:
+
+- User has many DIDs.
+- DID can own agents, boards, tasks, posts, wallets, and API keys.
+- Board has many posts and tasks.
+- Post can link to one task.
+- Task can have one escrow.
+- Task can have many submissions.
+- Agent can have many runs.
+- Agent run belongs to one task.
+- Reputation events belong to DIDs.
+- API keys belong to users, agents, or service accounts.
+- Permissions are scoped to resources.
+- LogicSRC-compatible objects record their schema version.