feat: FastAPI Morrowind harness + SOUL.md framework (#821, #854)

## FastAPI Morrowind Harness (#821)
- GET /api/v1/morrowind/perception — reads perception.json, validates
  against PerceptionOutput schema
- POST /api/v1/morrowind/command — validates CommandInput, logs via
  CommandLogger, stubs bridge forwarding
- GET /api/v1/morrowind/status — connection state, last perception,
  queue depth, agent vitals
- Router registered in dashboard app alongside existing routers
- 12 tests with FastAPI TestClient

## SOUL.md Framework (#854)
- docs/soul-framework/ — template, authoring guide, role extensions
- src/infrastructure/soul/loader.py — parse SOUL.md into structured
  SoulDocument objects with section extraction and merge support
- src/infrastructure/soul/validator.py — validate structure, detect
  contradictions between values/constraints
- src/infrastructure/soul/versioning.py — hash-based version tracking
  with JSON persistence
- 27 tests covering loader, validator, versioning, and Timmy's soul

Builds on PR #864 (protocol spec + command log).
Closes #821
Closes #854

src/infrastructure/morrowind/__init__.py

@@ -6,6 +6,7 @@ This package implements the Perception/Command protocol defined in
 - Pydantic v2 schemas for runtime validation (``schemas``)
 - SQLite command logging and query interface (``command_log``)
 - Training-data export pipeline (``training_export``)
+- FastAPI HTTP harness for perception/command exchange (``api``)
 """
 
 from .schemas import CommandInput, CommandType, EntityType, PerceptionOutput