feat: add Rings Network Python SDK + Blackboard Adapter

Phase 1 of Rings Network integration — foundation layer.

New module: src/asi_build/rings/ (4 files, ~1,300 LOC)
- client.py: Async RingsClient — DHT ops, Chord ring, Sub-Rings, sessions,
  connection lifecycle, VID computation. InMemoryTransport for testing.
- did.py: RingsDID — DID creation (secp256k1/ed25519), W3C DID Documents,
  proof generation/verification, VID addressing, service registration.
- reputation.py: ReputationClient — Ranking Protocol local scoring (3-factor
  with exponential decay), trust tiers, trustworthiness checks, slash reports,
  median game reward, network statistics.
- __init__.py: Clean public API with all 18 exported symbols.

New adapter: integration/adapters/rings_adapter.py (~500 LOC)
- RingsNetworkAdapter: BlackboardParticipant + Producer + Consumer + Transformer
- Posts: peer discovery, DID auth, reputation updates, slash reports, Sub-Ring
  events, network status
- Consumes: reasoning/KG/consciousness entries for P2P replication
- Transforms: enriches entries with reputation scores
- Event emission: threshold crossing detection, connection state
- Graceful degradation: all components optional (None → skip)

Tests: tests/test_rings.py (108 tests, all passing)
- RingsClient: connection, DHT, ring, sub-ring, session, DID resolution (36)
- RingsDID: creation, proof gen/verify, resolution, VIDs, documents (19)
- ReputationClient: scoring, trust tiers, slash, median game, stats (18)
- RingsNetworkAdapter: registration, events, produce, consume, transform (32)
- End-to-end integration flow (1)
- Graceful degradation (3)

Full suite: 3152 passed, 25 skipped, 0 failures (no regressions).

Author: web3guru888

src/asi_build/integration/adapters/__init__.py

@@ -37,6 +37,7 @@
 - ``KnowledgeGraphAdapter``       — TemporalKG, KGPathfinder
 - ``CognitiveSynergyAdapter``     — CognitiveSynergyEngine, SynergyMetrics
 - ``ReasoningAdapter``            — HybridReasoningEngine
+- ``RingsNetworkAdapter``         — Rings P2P Network, DID, Reputation
 
 Utilities
 ~~~~~~~~~
@@ -54,6 +55,7 @@
 from .consciousness_adapter import ConsciousnessAdapter
 from .knowledge_graph_adapter import KnowledgeGraphAdapter
 from .reasoning_adapter import ReasoningAdapter
+from .rings_adapter import RingsNetworkAdapter
 
 logger = logging.getLogger(__name__)
 
@@ -62,6 +64,7 @@
     "KnowledgeGraphAdapter",
     "CognitiveSynergyAdapter",
     "ReasoningAdapter",
+    "RingsNetworkAdapter",
     "wire_all",
     "production_sweep",
 ]