Widen single-line re-anchor window to recover larger mis-anchors

The model-reported anchor for a single-line suggestion can be off by more
than 8 lines (e.g. PR #8933 VendorNL Confirm() was off by 10, label rename
off by 9). Widen the search window to 40 lines either side so the correct
target within the same procedure is considered, while the 0.5 similarity
floor and 0.1 ambiguity margin keep an unrelated look-alike from winning.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Jesper Schulz-Wedde

tools/Code Review/scripts/Invoke-CopilotPRReview.ps1

@@ -556,17 +556,20 @@ function Resolve-SuggestionPlacement {
     # A one-line suggestion almost always *edits* a line, so it is NOT equal to
     # the line it replaces (e.g. inserting 'this.' for CodeCop AA0248). Exact
     # equality therefore fails for the common case and the model's reported
-    # anchor is unreliable (it frequently points at a neighbouring comment or
-    # blank line). We instead score every file line in a window around the
-    # anchor by similarity to the suggested line and take the clear winner.
-    # When no candidate is similar enough, or the best is ambiguous against the
-    # runner-up, we return $null so the caller suppresses the ```suggestion```
-    # block (posting a manual snippet) rather than corrupting the file by
-    # trusting the wrong anchor.
+    # anchor is unreliable: it frequently points at a neighbouring statement
+    # inside the same procedure (observed off by 10+ lines), a comment, or a
+    # blank line. We score the file lines in a window around the anchor by
+    # similarity to the suggested line and take the clear winner. The window is
+    # wide enough to recover a target elsewhere in the same procedure, while the
+    # similarity floor, ambiguity margin, and proximity tie-break keep an
+    # unrelated look-alike from being chosen. When no candidate is similar
+    # enough, or the best is ambiguous against the runner-up, we return $null so
+    # the caller suppresses the ```suggestion``` block (posting a manual
+    # snippet) rather than corrupting the file by trusting the wrong anchor.
     if ($sCount -eq 1) {
         $minSimilarity   = 0.5   # absolute confidence floor for a re-anchor
         $ambiguityMargin = 0.1   # winner must beat the runner-up by this much
-        $window          = 8
+        $window          = 40    # lines either side of the anchor to consider
 
         $lo = [math]::Max(1, $AnchorLine - $window)
         $hi = [math]::Min($fileCount, $AnchorLine + $window)