Sheet metal rims and holes, plastic features, lofts, raised pieces and merged walls take face attachments (#677)

Sheet metal rims and bend ends attach by name (<panel>:rim.<edge>, <flange>:rim.bend0/1), as do face profiles from sheet faces. A plain or counterbored Hole square to a panel is machined into the flat pattern. Boss, Lip, Rest and Snap Fit keep the body's history and name their own faces. Hole tools name their faces by the part they cut, and pattern copies as copies. A pattern's repeated fillets keep the body's history. Loft sides are named by their section curves. A piece Offset Face moved off its face's plane attaches by its own qualified name. Sides of a profile grown to overlap a flush body keep their sketch line's name, so walls a Join merged take a sketch (#681). Face sketch 75% -> 90%, offset plane 75% -> 90%, press-pull/extrude 64% -> 85% in the action matrix; baseline blessed.

Fixes #494, fixes #495, fixes #560, fixes #561, fixes #563, fixes #564, fixes #681.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/action-matrix.md

@@ -268,7 +268,9 @@ Where the face history stands (`crates/kernel/src/history.rs`, [face attachments
 a flat face takes an attached sketch when the body carries an exact source certificate for it
 (extrude caps and sides, boxes, shells' inner walls, STEP faces, sheet metal panels), or else
 when its persistent name follows exact history (a `lineage` certificate): cut walls and floors,
-chamfers, pattern and mirror copies, sides a Join merged, and pieces of a split face. What still
-refuses a sketch is what makes faces without recording their history (revolves in some cases,
-Offset Face, the plastic features, lofts, sweeps, drafts, tapers, shell rims, sheet metal rims):
-press-pull and extrude-from-face then fall back to a legacy face sketch found again by a point.
+chamfers, pattern and mirror copies, sides a Join merged, revolves, lofts, sweeps, drafts, tapers,
+shell rims, the plastic features' faces and the faces around them, and pieces of a split face (by
+the piece's own name where Offset Face moved it off the others' plane). Sheet metal panels, their
+rims and the flat ends of bends attach by name. What still refuses a sketch is what makes faces
+without recording their history (some cuts, Split Body, Intersect): press-pull and
+extrude-from-face then fall back to a legacy face sketch found again by a point.