fix(orchestration): keep Goals and queued turns working in the live read model

[sheehanmunim]

Problem

Two features were dead at runtime in the fork:

• Goals: /goal set an Objective, but the thread never continued working. thread.goal.continue was rejected with "has no Active Goal to continue".
• Queued turns: a message queued while the agent was busy could never be dispatched — "Queued user message is no longer waiting on thread".

Both had the same root cause. apps/server/src/orchestration/projector.ts — the in-memory projection that OrchestrationEngine builds the read model from, and that the decider validates commands against — handled 39 event types and silently dropped the rest via its default branch. Every thread.goal-* and queued-turn event fell through, so thread.goal stayed null and queued messages never got deliveryState: "queued". The SQL projection handled them, but the decider does not read from SQL.

A third gap sat on top: ProviderCommandReactor.processTurnStartRequested required a user message for every turn start. A Continuation starts a Turn with no message — the Objective is rendered into T3-authored prompt text instead — so even a correctly-projected Goal died with "User message 'undefined' was not found for turn start request." That hunk came in with the Goals feature and was dropped by a later integration merge.

Fix

• projector.ts: project thread.goal-set/-paused/-resumed/-blocked/-usage-limited/-completed/-cleared and thread.turn-queued / -dispatched / -cancelled.
• ProjectionPipeline.ts: write the goal cases to SQL too — goal_json has had a column since migration 041 and nothing ever wrote it.
• ProviderCommandReactor.ts: restore the message-less Continuation path, using buildGoalContinuationPrompt(objective) as the turn input and skipping first-turn work (branch rename, title generation) since there is no user message to seed from.
• Schemas.ts: re-export the three queued-turn payload schemas.
• ProjectionSnapshotQuery.test.ts: expect the activeOrderKey the shell snapshot now returns.

Verification

vp test run src/orchestration — 439 passing, 36 files. Before: 433 passing, 6 failing across ProviderCommandReactor, decider.queuedTurns and ProjectionSnapshotQuery. Server typecheck clean.

Model: Claude Opus 5, harness: Claude Code