feat: support cloud scheduled task execution

[glittercowboy]

Summary

• advertises daemon support for task origin metadata and stop messages in hello capabilities
• logs scheduled task origin/run IDs for task correlation
• keeps the daemon-local cron scheduler behind GSD_DAEMON_LOCAL_CRON_SCHEDULER=1 while cloud worker scheduling owns recurring execution

Verification

• GOWORK=off go test ./...
• GOWORK=off go build -o gsd-cloud .

Dependency / Release

• Uses github.com/gsd-build/protocol-go v0.13.0.
• Runtime release requires the daemon tag/workflow after merge.

[coderabbitai]

📝 Walkthrough

Walkthrough

The PR updates the protocol-go dependency and introduces task origin tracking. Changes include conditional cron scheduling via environment variable gate, relay capability advertisement, and enhanced logging with task origin metadata (kind, scheduled task ID, run ID) across logging, relay, and session components.

Changes

Cohort / File(s)	Summary
Dependency Update go.mod	Updates github.com/gsd-build/protocol-go dependency to a newer pseudo-version.
Logging Enhancements internal/logging/context.go, internal/logging/context_test.go	Augments TaskAttrs to conditionally include task origin metadata (taskOrigin, scheduledTaskId, scheduledRunId) when task.Origin is present. Adds test verifying origin field extraction.
Cron Scheduling Gate internal/loop/daemon.go, internal/loop/daemon_test.go	Introduces environment-based conditional (GSD_DAEMON_LOCAL_CRON_SCHEDULER == "1") to control cron scheduler startup via localCronSchedulingEnabled() helper. Adds test validating behavior based on environment variable.
Relay Capabilities internal/relay/conn.go, internal/relay/conn_test.go	Sets protocol.Hello.Capabilities in relay handshake to advertise TaskOrigin and Stop support. Updates test to validate capability fields presence and correctness.
Task Execution Logging internal/session/actor.go	Conditionally emits task origin metadata in executeTask logging when incoming protocol.Task.Origin is non-nil.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• Remove skill sync from daemon #36: Also updates the github.com/gsd-build/protocol-go dependency version in go.mod.

Poem

🐰 With origins traced and tasks now named,
Our scheduling dances, conditionally tamed,
Capabilities broadcast through relay's embrace,
Every hop logged with time and place! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 12.50% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: adding support for cloud scheduled task execution, which aligns with all file modifications including task origin logging, capability advertisement, and cron scheduler gating.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/cloud-scheduled-tasks

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