fix(dashboard): Cleanup unsafe accesses to possibly undefined values in order timeline (#10454)

**What**
- Fixes an unsafe access to a field that may be undefined if an order was created through a custom workflow.

.changeset/spicy-carrots-itch.md

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+---
+"@medusajs/dashboard": patch
+---
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+fix(dashboard): Cleanup unsafe accesses to possibly undefined values in order timeline