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

docs/data-models.md

@@ -242,11 +242,74 @@ This object feeds the Canonical Meeting Knowledge representation.
 
 ---
 
+# Canonical Extraction Object
+
+Planned deterministic intermediate object created from raw chunk extraction
+JSON.
+
+Example:
+
+```json
+{
+    "id": "fact.chunk_03.0001",
+    "category": "fact",
+    "text": "...",
+    "source_references": [
+        {
+            "chunk_id": "chunk_03",
+            "source_file": "chunk_03_extraction.json",
+            "evidence": "..."
+        }
+    ]
+}
+```
+
+The Deterministic Canonicalizer should create this kind of object without an
+LLM. It validates and normalizes raw extraction objects, assigns stable IDs and
+source references, normalizes category names and basic field structure,
+performs only safe deterministic cleanup, may group exact duplicates and must
+preserve all source evidence.
+
+It must not perform uncertain semantic merging.
+
+---
+
+# Consolidated Topic
+
+Planned semantic object produced by the Semantic Consolidator.
+
+Example:
+
+```json
+{
+    "topic_id": "topic_001",
+    "title": "...",
+    "background": [],
+    "decisions": [],
+    "action_items": [],
+    "open_questions": [],
+    "durable_information": [],
+    "uncertainty": [],
+    "source_references": []
+}
+```
+
+The Semantic Consolidator may use the local LLM to merge semantically
+equivalent statements, group content by topic, preserve evidence from all
+contributing chunks, mark contradictions and uncertainty and separate durable
+information from transient discussion.
+
+It produces Canonical Meeting Knowledge. It does not directly write a protocol.
+
+---
+
 # Canonical Meeting Knowledge
 
 The canonical semantic representation of one meeting.
 
 This representation is the single source of truth for all downstream outputs.
+It is a structured representation, preferably JSON, and is not itself a prose
+protocol.
 
 ```json
 {
@@ -260,6 +323,7 @@ This representation is the single source of truth for all downstream outputs.
     "questions": [],
     "positions": [],
     "technical_details": [],
+    "durable_information": [],
     "rationale": [],
     "uncertainty": [],
     "source_references": []