feat(classification-spine): implement STATE-WP-0065 repo-anchored model

Replace the ad-hoc coordination-domain spine with the Repo Classification
Standard: 14 market domains, classification columns on managed_repos, and
workplans anchored by repo_id (topic_id optional).

- Add Alembic migration d8e9f0a1b2c3 with data backfill and workstream→workplan rename
- Add api/classification.py validation and register-from-classification tooling
- Expose workplan-first REST/MCP surface with legacy workstream aliases
- Add C-24 consistency rule and legacy domain frontmatter mapping
- Update dashboard repos page with category/capability/stake filters
- Update orientation docs; mark STATE-WP-0065 finished

api/schemas/progress_event.py

@@ -2,12 +2,17 @@ import uuid
 from datetime import datetime
 from typing import Any
 
-from pydantic import BaseModel, ConfigDict
+from pydantic import AliasChoices, BaseModel, ConfigDict, Field
+
+from api.schemas.compat import OptionalWorkplanIdCompatMixin
 
 
 class ProgressEventCreate(BaseModel):
     topic_id: uuid.UUID | None = None
-    workstream_id: uuid.UUID | None = None
+    workplan_id: uuid.UUID | None = Field(
+        default=None,
+        validation_alias=AliasChoices("workplan_id", "workstream_id"),
+    )
     task_id: uuid.UUID | None = None
     decision_id: uuid.UUID | None = None
     event_type: str
@@ -17,11 +22,10 @@ class ProgressEventCreate(BaseModel):
     session_id: str | None = None
 
 
-class ProgressEventRead(BaseModel):
+class ProgressEventRead(OptionalWorkplanIdCompatMixin, BaseModel):
     model_config = ConfigDict(from_attributes=True)
     id: uuid.UUID
     topic_id: uuid.UUID | None = None
-    workstream_id: uuid.UUID | None = None
     task_id: uuid.UUID | None = None
     decision_id: uuid.UUID | None = None
     event_type: str
@@ -29,4 +33,4 @@ class ProgressEventRead(BaseModel):
     detail: dict[str, Any] | None = None
     author: str | None = None
     session_id: str | None = None
-    created_at: datetime
+    created_at: datetime