ci(snapshots): run every 2h

.github/workflows/snapshots.yml

@@ -2,9 +2,11 @@ name: Snapshots
 
 on:
   schedule:
-    # Off the busy slots (top of the hour, */4 hours): GitHub skips scheduled runs under load.
-    - cron: '23 2,6,10,14,18,22 * * *'
-    # Hourly through the 5th: a thread lands on the first weekday, as late as the 3rd.
+    # Off the busy minutes. GitHub skips and delays scheduled runs under load: every 4h left gaps of
+    # 10h (2026-10-10), past STALE_AFTER_MS. More slots shrink the gap a skip leaves.
+    - cron: '23 */2 * * *'
+    # Hourly through the 5th: a thread lands on the first weekday, as late as the 3rd. Until a run
+    # after a new thread, the Worker parses that thread whole per request (over the CPU limit when large).
     - cron: '49 * 1-5 * *'
   # Keep inputs empty: nothing is interpolated into the run.
   workflow_dispatch:

src/sources/boards.ts

@@ -2,7 +2,7 @@ import { parseSnapshot, SNAPSHOT_KEY } from '../boards/snapshot.ts';
 import { SourceError, type Adapter } from '../types.ts';
 
 const HOUR = 60 * 60 * 1000;
-/** One missed 4-hourly run plus scheduler delay. */
+/** Scheduled snapshots (snapshots.yml) must land more often than this, GitHub's skips and delays included. */
 export const STALE_AFTER_MS = 9 * HOUR;
 export const DROP_AFTER_MS = 24 * HOUR;