feat(WP-0003b): parser, workflow wiring, triggers, webhooks

T44: ActivityDefinition markdown file parser (definition_parser.py)
  - Scans activity-definitions/*.md and ACTIVITY_DEFINITION_DIRS paths
  - Parses YAML frontmatter + fenced rule/instruction blocks
  - Raises ParseError on any malformed file — never silently skips

T45: ActivityDefinition sync command
  - Migration 0006: adds rules_json/instructions_json JSONB columns
  - sync_activity_definitions.py + make sync-activity-definitions
  - Called at worker startup before schedule sync

T46: Rule/instruction pipeline wired into RunActivityWorkflow
  - New evaluate_rules and emit_tasks Temporal activities
  - Workflow passes event_envelope_json to enable rule evaluation
  - EventRouter now passes full envelope JSON as 4th workflow arg
  - IssueSink.emit() writes task_spawn_log rows per task

T47: ScheduledTriggerConfig model (one-off future datetime trigger)

T48: One-off Temporal Schedule support
  - Fixed timezone_name → time_zone_name (was causing all schedule tests to fail)
  - Added ScheduleCalendarSpec-based one-off schedule with remaining_actions=1
  - cancel_scheduled() for admin cancellation
  - Fixed backfill() call to use *args unpacking (not list wrapper)
  - Fixed ScheduleAlreadyRunningError catch in upsert_schedule
  - sync_schedules now handles ScheduledTriggerConfig definitions

T49: Webhook receiver
  - POST /webhooks/gitea  — HMAC-SHA256 via X-Gitea-Signature-256
  - POST /webhooks/github — HMAC-SHA256 via X-Hub-Signature-256
  - Normalisers: repo.created, push, issue.closed → EventEnvelope
  - Publishes to NATS activity.{type} subject after registry validation
  - Mounted in api.py at /webhooks prefix

T50: Gitea event type definitions
  - gitea.repo.created.md, gitea.push.md, gitea.issue.closed.md
  - Each includes normaliser field mapping in Consumer Notes

Tests: 18 passed, 1 skipped (integration). Fixed embedded Temporal
server visibility latency in test_upsert_schedule_creates_schedule.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/activity_core/sync_schedules.py

@@ -20,7 +20,7 @@ from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
 from temporalio.client import Client
 
-from activity_core.models import ActivityDefinition, CronTriggerConfig
+from activity_core.models import ActivityDefinition, CronTriggerConfig, ScheduledTriggerConfig
 from activity_core.orm import ActivityDefinition as ActivityDefinitionRow
 from activity_core.schedule_manager import delete_schedule, list_schedules, upsert_schedule
 
@@ -63,7 +63,7 @@ async def sync(client: Client, db_url: str) -> None:
             rows = (
                 await session.scalars(
                     select(ActivityDefinitionRow).where(
-                        ActivityDefinitionRow.trigger_type == "cron"
+                        ActivityDefinitionRow.trigger_type.in_(["cron", "scheduled"])
                     )
                 )
             ).all()
@@ -76,8 +76,8 @@ async def sync(client: Client, db_url: str) -> None:
 
     for row in rows:
         defn = _row_to_domain(row)
-        if not isinstance(defn.trigger_config, CronTriggerConfig):
-            continue  # should not happen given the WHERE clause, but guard anyway
+        if not isinstance(defn.trigger_config, (CronTriggerConfig, ScheduledTriggerConfig)):
+            continue
 
         db_activity_ids.add(str(defn.id))