feat: Lightning interface, swarm routing, sovereignty audit, embodiment prep

Lightning Backend Interface:
- Abstract LightningBackend with pluggable implementations
- MockBackend for development (auto-settle invoices)
- LndBackend stub with gRPC integration path documented
- Backend factory for runtime selection via LIGHTNING_BACKEND env

Intelligent Swarm Routing:
- CapabilityManifest for agent skill declarations
- Task scoring based on keywords + capabilities + bid price
- RoutingDecision audit logging to SQLite
- Agent stats tracking (wins, consideration rate)

Sovereignty Audit:
- Comprehensive audit report (docs/SOVEREIGNTY_AUDIT.md)
- 9.2/10 sovereignty score
- Documented all external dependencies and local alternatives

Substrate-Agnostic Agent Interface:
- TimAgent abstract base class
- Perception/Action/Memory/Communication types
- OllamaAdapter implementation
- Foundation for future embodiment (robot, VR)

Tests:
- 36 new tests for Lightning and routing
- 472 total tests passing
- Maintained 0 warning policy

src/lightning/__init__.py

@@ -0,0 +1,26 @@
+"""Lightning Network payment backend interface.
+
+This module provides a pluggable interface for Lightning Network operations,
+allowing seamless switching between mock (development) and real LND backends.
+
+Usage:
+    from lightning import get_backend, Invoice
+    
+    backend = get_backend()  # Uses LIGHTNING_BACKEND env var
+    invoice = backend.create_invoice(amount_sats=100, memo="API access")
+    paid = backend.check_payment(invoice.payment_hash)
+
+Configuration:
+    LIGHTNING_BACKEND=mock   # Default, for development
+    LIGHTNING_BACKEND=lnd    # Real LND via gRPC
+    
+    # LND-specific settings (when backend=lnd)
+    LND_GRPC_HOST=localhost:10009
+    LND_TLS_CERT_PATH=/path/to/tls.cert
+    LND_MACAROON_PATH=/path/to/admin.macaroon
+"""
+
+from lightning.base import Invoice, LightningBackend
+from lightning.factory import get_backend
+
+__all__ = ["Invoice", "LightningBackend", "get_backend"]