ci: fix infinite generate loop and update schedule to 5am/5pm Pacific

- Restore workflow.lock to HEAD before checking for changes to avoid
  non-deterministic codeSamplesRevisionDigest diffs triggering endless
  generate→merge loops
- Change schedule from daily 6am UTC to 5am & 5pm Pacific (12:00 & 00:00 UTC)

Co-Authored-By: AJ Steers <aj@airbyte.io>

Author: devin-ai-integration[bot]

.github/workflows/generate-command.yml

@@ -5,7 +5,7 @@
 #
 # Triggers:
 # - On push to main: Auto-generates after every merge to ensure SDK stays up-to-date (auto-merge enabled)
-# - Daily schedule (6 AM UTC): Catches upstream API spec changes (auto-merge enabled)
+# - Daily schedule (5 AM & 5 PM Pacific): Catches upstream API spec changes (auto-merge enabled)
 # - Manual workflow_dispatch: For on-demand generation
 # - Slash command (/generate): Regenerates and pushes results back to the PR branch
 # - workflow_call: For validation from other workflows (e.g., PR checks)
@@ -30,7 +30,8 @@ name: Generate SDK
         branches:
             - main
     schedule:
-        - cron: '0 6 * * *'
+        - cron: '0 12 * * *'
+        - cron: '0 0 * * *'
     workflow_dispatch:
         inputs:
             dry_run:
@@ -203,6 +204,9 @@ jobs:
               if: ${{ !inputs.dry_run }}
               id: changes
               run: |
+                  # Restore workflow.lock to HEAD to ignore non-deterministic
+                  # digest changes that cause infinite generate→merge loops.
+                  git checkout HEAD -- .speakeasy/workflow.lock 2>/dev/null || true
                   if [ -n "$(git status --porcelain)" ]; then
                       echo "has_changes=true" >> $GITHUB_OUTPUT
                   else