fix: add missing changeset frontmatter delimiters

Six changesets were missing the opening (and in most cases closing) `---`
delimiters around their YAML frontmatter, so changeset could not parse the
package bump. Wrap each in proper `---` blocks.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.changeset/auto-git-init-project-registration.md

@@ -1,3 +1,5 @@
+---
 "@runfusion/fusion": patch
+---
 
 Initialize missing Git repositories automatically when registering Fusion projects.

.changeset/fn-1467-pr-feedback-fixes.md

@@ -1,3 +1,5 @@
+---
 "@runfusion/fusion": patch
+---
 
 Fix project selector review regressions around optional selection handlers and bookmarked search matches, and tighten retry/backoff timeout and rate-limit handling.

.changeset/fn-blank-page-service-worker-assets.md

@@ -1,3 +1,5 @@
+---
 "@runfusion/fusion": patch
+---
 
 Revalidate dashboard service-worker assets before falling back to cache so rebuilt tabs cannot stay on stale bundles and render a blank page.

.changeset/merge-queue-stall-badges.md

@@ -1,3 +1,4 @@
+---
 "@runfusion/fusion": patch
 ---
 

.changeset/merge-worktree-canonical-path.md

@@ -1,3 +1,5 @@
+---
 "@runfusion/fusion": patch
+---
 
 Fix coding-agent startup and tool boundary checks from AI merge temp worktrees on macOS by comparing Git worktree paths with filesystem-canonical paths.

.changeset/merge-worktree-task-tools.md

@@ -1,3 +1,5 @@
+---
 "@runfusion/fusion": patch
+---
 
 Fix Fusion task tools from AI merge temp worktrees so merger agents can fetch task details without trying to bootstrap a nested project.