[suguanYang]

Summary

 collectReferences(content)
-  stop at the first bracket or parenthesis
+  preserve balanced delimiters inside asset names
 syncArchive()
+  persist the pinned archive identity before starting the first entry

DOCX image names such as images/image-[1] Generated.png previously produced a nonexistent images/image-[1 reference and prevented final snapshot publication. Preserve the full path without relaxing missing-origin or integrity checks. Persist a zero-entry checkpoint before copying a large first resource so a deadline retains the immutable generation for the next invocation.

Evidence

• Before: New public snapshot tests failed with missing origins for bracketed image names and parenthesized Markdown targets; the first-entry deadline test had no persisted checkpoint.
  After: 587 tests pass across 28 files, including all four delimiter regressions and first-entry deadline/resume. TypeScript, ESLint, Prettier, and diff checks pass.
• Manual diff and surrounding-code review found no actionable issues. Existing negative integrity, cancellation, lease, and checkpoint failure tests remain passing.
• Production DOCX reacceptance is pending SDK publication and Hipo deployment; this PR does not claim live acceptance.

Merge Danger

Door: two-way

Blast Radius: snapshots

Immutable archive identities and content hashes remain mandatory. The additional initial checkpoint has no copied entries and is never a completed commit.