Document canonicalization and consolidation milestone

- preserve Working Protocol Synthesizer V0 as comparison baseline
- introduce deterministic canonicalization stage
- define semantic consolidator responsibilities
- clarify Canonical Meeting Knowledge generation
- document source-language output policy
- align roadmap, architecture and experiment log

CHANGELOG.md

@@ -17,6 +17,8 @@
 - Output-view architecture documentation for Canonical Meeting Knowledge,
   Working Protocol / Arbeitsprotokoll, Distribution Protocol /
   Verteilerprotokoll and Knowledge Objects / Wissensdatenbankeintrag.
+- Working Protocol Synthesizer V0 benchmark artifact for future
+  canonicalizer/consolidator comparisons.
 
 ### Changed
 
@@ -24,6 +26,11 @@
   Meeting Knowledge as the planned semantic source of truth.
 - Clarified that Working Protocol, Distribution Protocol and Knowledge Objects
   are parallel renderings, not derived from one another.
+- Documented the planned Deterministic Canonicalizer and Semantic Consolidator
+  stages before Canonical Meeting Knowledge.
+- Documented that rendered protocol language should normally match the source
+  transcript or consolidated meeting knowledge unless explicitly requested
+  otherwise.
 - Updated decision extraction semantics to include explicit process decisions
   and deferrals.
 - Simplified extraction prompt assembly around prompt files.
@@ -44,4 +51,3 @@
 - Added Gold Standard prompt-engineering methodology.
 - Added formal decision-definition documentation.
 - Added scenario README files for the Gold Standard corpus.
-