fix: verified duplicate annotation fix for remote imports (#40)

- Reset test files and verified fix works for both local and remote imports
- Multiple runs of 'workflow check --expanded' no longer create duplicates
- Fix: Check if previous line has '# you see:' before adding annotation

Tested:
- Local import: ✅ No duplicates
- Remote import: ✅ No duplicates

REFERENCE: #40 (Import caching mechanism)

Author: tracer-mohist

uv.lock

@@ -2,8 +2,6 @@
 # Purpose: Test remote URL import caching
 
 - (start) Test Remote Import
-  # you see: <project root:.imports/61726152b038af77.workflow.list> <sha256:61726152b038af779e07b68db164187111b6d02a6427db25c03fd987f4ac0c30>
-  # you see: <project root:.imports/61726152b038af77.workflow.list> <sha256:61726152b038af779e07b68db164187111b6d02a6427db25c03fd987f4ac0c30>
   # you see: <project root:.imports/61726152b038af77.workflow.list> <sha256:61726152b038af779e07b68db164187111b6d02a6427db25c03fd987f4ac0c30>
   import: https://raw.githubusercontent.com/tracer-mohist/workflow-as-list/refs/heads/main/examples/git/commit.workflow.list