default resilience

.github/pull_request_template.md

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+## Summary
+
+<!-- What does this PR do? Link related issues with "Fixes #123". -->
+
+## Changes
+
+<!-- Brief list of what changed. -->
+
+## Testing
+
+- [ ] `cargo clippy --workspace --all-targets -- -D warnings` passes
+- [ ] `cargo test --workspace` passes
+- [ ] Live integration tested (if applicable)
+
+## Security
+
+- [ ] No new unsafe code
+- [ ] No secrets or API keys in diff
+- [ ] User input validated at boundaries