Document the DocForge 1.0 release

SLICE_HISTORY.md

@@ -1,5 +1,25 @@
 # Completed slices
 
+## Release 1.0.0 stable product boundary
+
+### Changed
+
+- Designated the complete project-scoped graph, CLI, MCP, changeset, application, rendering, and
+  visualization surface as DocForge 1.0.0.
+- Completed the Nodes, semantic Flow, and convergence Web model.
+- Replaced generic node-role circles with semantic cards for Structure, Behavior, Dependency,
+  Execution, Data, Evidence, Context, and Related contributors.
+- Made readable leaf names and node kinds visible on the canvas without truncating long
+  identifiers. Full qualified identities remain available in tooltips and inspectors.
+- Preserved branch-aware hiding so Flow and Web remove upstream-only ancestors while retaining
+  descendants and alternate paths into the focus.
+
+### Verification
+
+- Strict Pyright, Ruff, formatting, compilation, warning-strict tests, HTML/CSS/JavaScript checks,
+  package builds, and browser QA pass for the Release 1 surface.
+- The Release 1 tag is `v1.0.0`.
+
 ## DFG-20 gated application and self-service graph operations
 
 ### Changed