schedule: fire --every now by default, add run-once for cron-style triggers (#689)

Interval schedules used to wait the full interval before their first run, which
made `--every 1d` feel broken for fresh schedules. Now `--every` fires
immediately on creation; `--cron` keeps waiting for the next slot. `--no-run-now`
and `--run-now` override the defaults, and the parser rejects redundant combos.

Adds `paseo schedule run-once <id>` to manually trigger a single run without
advancing cadence or recomputing completion. The new `runOnCreate` field and
`schedule/run-once` RPC are additive on the WebSocket schema.

packages/server/src/shared/messages.ts

@@ -28,6 +28,7 @@ import {
   SchedulePauseRequestSchema,
   ScheduleResumeRequestSchema,
   ScheduleDeleteRequestSchema,
+  ScheduleRunOnceRequestSchema,
   ScheduleCreateResponseSchema,
   ScheduleListResponseSchema,
   ScheduleInspectResponseSchema,
@@ -35,6 +36,7 @@ import {
   SchedulePauseResponseSchema,
   ScheduleResumeResponseSchema,
   ScheduleDeleteResponseSchema,
+  ScheduleRunOnceResponseSchema,
 } from "../server/schedule/rpc-schemas.js";
 import {
   LoopRunRequestSchema,
@@ -1765,6 +1767,7 @@ export const SessionInboundMessageSchema = z.discriminatedUnion("type", [
   SchedulePauseRequestSchema,
   ScheduleResumeRequestSchema,
   ScheduleDeleteRequestSchema,
+  ScheduleRunOnceRequestSchema,
   LoopRunRequestSchema,
   LoopListRequestSchema,
   LoopInspectRequestSchema,
@@ -3378,6 +3381,7 @@ export const SessionOutboundMessageSchema = z.discriminatedUnion("type", [
   SchedulePauseResponseSchema,
   ScheduleResumeResponseSchema,
   ScheduleDeleteResponseSchema,
+  ScheduleRunOnceResponseSchema,
   LoopRunResponseSchema,
   LoopListResponseSchema,
   LoopInspectResponseSchema,
@@ -3483,6 +3487,7 @@ export type ScheduleLogsResponse = z.infer<typeof ScheduleLogsResponseSchema>;
 export type SchedulePauseResponse = z.infer<typeof SchedulePauseResponseSchema>;
 export type ScheduleResumeResponse = z.infer<typeof ScheduleResumeResponseSchema>;
 export type ScheduleDeleteResponse = z.infer<typeof ScheduleDeleteResponseSchema>;
+export type ScheduleRunOnceResponse = z.infer<typeof ScheduleRunOnceResponseSchema>;
 export type LoopRunResponse = z.infer<typeof LoopRunResponseSchema>;
 export type LoopListResponse = z.infer<typeof LoopListResponseSchema>;
 export type LoopInspectResponse = z.infer<typeof LoopInspectResponseSchema>;
@@ -3541,6 +3546,7 @@ export type ScheduleLogsRequest = z.infer<typeof ScheduleLogsRequestSchema>;
 export type SchedulePauseRequest = z.infer<typeof SchedulePauseRequestSchema>;
 export type ScheduleResumeRequest = z.infer<typeof ScheduleResumeRequestSchema>;
 export type ScheduleDeleteRequest = z.infer<typeof ScheduleDeleteRequestSchema>;
+export type ScheduleRunOnceRequest = z.infer<typeof ScheduleRunOnceRequestSchema>;
 export type LoopRunRequest = z.infer<typeof LoopRunRequestSchema>;
 export type LoopListRequest = z.infer<typeof LoopListRequestSchema>;
 export type LoopInspectRequest = z.infer<typeof LoopInspectRequestSchema>;