Add operator console and web surfaces

[sour4bh]

Summary

• add the authenticated Next.js operator dashboard for runs, DAGs, events, artifacts, checks, traces, provenance, usage, templates, schedules, workers, and clarifications
• add the static spawnd.dev landing site plus shared UI and typed API client packages
• extend the FastAPI surface with fleet/run listings, SSE event streaming, artifact content, runtime drilldowns, usage rollups, and clarification responses
• add dashboard deployment support for Compose and Podman
• add GitHub Actions coverage for Python, web, and the operator E2E smoke
• make AGENTS.md a symlink to CLAUDE.md

Reliability fixes

The readiness pass found that completion could duplicate ready-agent hints and concurrent dependency completions could strand a join agent. Completion now serializes per run, records ready outbox rows transactionally, and workers drain those rows instead of recreating them.

Redis live-event parsing now validates external payloads, preserves async idle ticks, exposes accurate iterator types, and closes resources when subscription setup fails.

The FastMCP capability tests now use the public client tool-list interface and the development dependencies include the Redis test double.

Validation

• PostgreSQL-backed Python gate: 171 passed, 1 deselected
• focused deployed/Redis regression gate: 58 passed, 1 deselected
• web lint and TypeScript checks
• web unit tests: 21 passed
• dashboard and landing production builds
• Playwright operator smoke: 2 passed
• Python compileall, dependency check, configuration parsing, and diff check
• changed Redis module/tests: zero Pyright errors

Known exception

test_create_run_records_agents_without_raw_env_or_prompt_secret remains explicitly deselected. Prompts currently live in the durable run spec because workers execute from it; changing that requires a product decision about separate prompt storage versus relaxing the assertion.

[sour4bh]

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