feat: implement ADR-297 phase-3 — RF twin, placement, spatial memory, counterfactual, info-gain, active sensing

The higher-ceiling primitives on the fused world state. Six crates, all
deterministic SYNTHETIC/L0 model scaffolds (a twin predicts, it never measures);
70 tests + 6 doctests, verified green independently.

ruview-twin (ADR-312): per-deployment RF twin — radio geometry, a documented
synthetic log-distance + wall-attenuation propagation model, per-link expected
distributions, and the load-bearing delta(observed,expected) that localizes a
physical change (moved node / new reflector) to specific links. 8 tests.

ruview-infogain (ADR-311): Value(sensor) = expected uncertainty reduction /
weighted cost; pure bounded-greedy selection under a multi-dimension budget;
unknown-value candidates handled explicitly (defer/probe, never silent zero). 15.

ruview-active (ADR-306): closed-loop control vocabulary (channel/bandwidth/
cadence/antenna as validated ranges); step() proposes the next measurement to
reduce uncertainty, widening exploration when the last response is UNKNOWN;
emits a plan, never RF. 13.

ruview-placement (ADR-305): floorplan + inventory -> ranked placement via the
twin's propagation model; blind-spot flags; predicted-vs-observed adjustment. 11.

ruview-memory (ADR-309): learns per-zone normal physics; anomalies are
significant deltas vs baseline emitted as evidence records; UNKNOWN before a
baseline exists (no false positives). 14.

ruview-counterfactual (ADR-310): scores hypotheses under the twin — empty-room
vs occupied, one person vs two; UNKNOWN when indistinguishable. 8.

Flips ADR-305/306/309/310/311/312 to implemented. Completes all three phases of
the ADR-297 perception-substrate program. No hardware/MEASURED claims.

Co-Authored-By: claude-flow <ruv@ruv.net>
Claude-Session: https://claude.ai/code/session_015TcKegTS7QqhWPC2L2SzaS

docs/adr/ADR-305-sensor-placement-optimizer.md

@@ -1,6 +1,6 @@
 # ADR-305: Sensor placement optimizer — floorplan + inventory → recommended positions
 
-- **Status**: Proposed (ADR-297 phase 3)
+- **Status**: Accepted — initial implementation (ADR-297 phase 3)
 - **Date**: 2026-08-11
 - **Deciders**: ruv
 - **Tags**: placement, planning, rf-twin, coverage, worldgraph, phase-3

docs/adr/ADR-306-active-sensing.md

@@ -1,6 +1,6 @@
 # ADR-306: Active sensing — closed-loop RF experiment control
 
-- **Status**: Proposed (ADR-297 phase 3)
+- **Status**: Accepted — initial implementation (ADR-297 phase 3)
 - **Date**: 2026-08-11
 - **Deciders**: ruv
 - **Tags**: active-sensing, control-plane, closed-loop, information-gain, actuation, phase-3

docs/adr/ADR-309-long-term-spatial-memory.md

@@ -1,6 +1,6 @@
 # ADR-309: Long-term spatial memory — learn the normal physics of a location
 
-- **Status**: Proposed (ADR-297 phase 3)
+- **Status**: Accepted — initial implementation (ADR-297 phase 3)
 - **Date**: 2026-08-11
 - **Deciders**: ruv
 - **Tags**: spatial-memory, ruvector, anomaly-detection, temporal, world-state, phase-3

docs/adr/ADR-310-counterfactual-inference.md

@@ -1,6 +1,6 @@
 # ADR-310: Counterfactual inference — generative spatial reasoning
 
-- **Status**: Proposed (ADR-297 phase 3)
+- **Status**: Accepted — initial implementation (ADR-297 phase 3)
 - **Date**: 2026-08-11
 - **Deciders**: ruv
 - **Tags**: inference, generative, counterfactual, rf-twin, fusion, uncertainty, phase-3

docs/adr/ADR-311-information-gain-scheduler.md

@@ -1,6 +1,6 @@
 # ADR-311: Information-gain scheduler — sample the most informative radios
 
-- **Status**: Proposed (ADR-297 phase 3)
+- **Status**: Accepted — initial implementation (ADR-297 phase 3)
 - **Date**: 2026-08-11
 - **Deciders**: ruv
 - **Tags**: scheduling, active-sensing, information-gain, edge, energy, fusion, phase-3

docs/adr/ADR-312-digital-rf-twin.md

@@ -1,6 +1,6 @@
 # ADR-312: Digital RF twin — persistent per-deployment RF model
 
-- **Status**: Proposed (ADR-297 phase 3)
+- **Status**: Accepted — initial implementation (ADR-297 phase 3)
 - **Date**: 2026-08-11
 - **Deciders**: ruv
 - **Tags**: rf-twin, digital-twin, propagation, calibration, spatial-memory, worldgraph, phase-3