v0.7.2

• Upstream sync: bump pin 0db6dcf → 27b3c76 (upstream v0.7.2); reviewed all 10 commits and 62 changed files, with runtime-only changes documented in UPSTREAM.md.
• Preserve original personal-wiki pages and pending retry markers when translation is empty or hits the output-token limit (#1008; thanks @xpeng5278-web).
• Preserve retrieval's collision-safe section alias for the first symbol-only heading without changing Markdown link validation (#1001; thanks @Yashwanth-Kumar-Kotla).
• Treat host-exposed Bedrock throttling signals as rate limits, restoring and deferring the page without immediate retry (#1011; thanks @xpeng5278-web).