docs: consolidate scattered documentation into wiki

Move architecture/, docs/ content into wiki/ for a single source of truth:
- architecture/deployment-blueprint.md → wiki/architecture/
- architecture/stack-architecture-review.md → wiki/architecture/
- architecture/wiki-platform-overview.md → wiki/architecture/
- docs/ARCHITECTURE.md → wiki/architecture/node-architecture.md
- docs/API_REFERENCE.md → wiki/concepts/generalfunctions-api.md
- docs/ISSUES.md → wiki/findings/open-issues-2026-03.md

Remove stale files:
- FUNCTIONAL_ISSUES_BACKLOG.md (was just a redirect pointer)
- temp/ (stale cloud env examples)

Fix README.md gitea URL (centraal.wbd-rd.nl → wbd-rd.nl).
Update wiki index with all consolidated pages.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

wiki/index.md

@@ -11,23 +11,38 @@ updated: 2026-04-07
 - [Knowledge Graph](knowledge-graph.yaml) — structured data, machine-queryable
 
 ## Architecture
+- [Node Architecture](architecture/node-architecture.md) — three-layer pattern, ports, mermaid diagrams
 - [3D Pump Curves](architecture/3d-pump-curves.md) — predict class, spline interpolation, unit chain
 - [Group Optimization](architecture/group-optimization.md) — BEP-Gravitation, combination selection, marginal-cost refinement
+- [Platform Overview](architecture/platform-overview.md) — edge/site/central layering, telemetry model
+- [Deployment Blueprint](architecture/deployment-blueprint.md) — Docker topology, rollout order
+- [Stack Review](architecture/stack-review.md) — full stack architecture assessment
+
+## Core Concepts
+- [generalFunctions API](concepts/generalfunctions-api.md) — logger, MeasurementContainer, configManager, etc.
 
 ## Findings
 - [BEP-Gravitation Proof](findings/bep-gravitation-proof.md) — within 0.1% of brute-force optimum (proven)
 - [NCog Behavior](findings/ncog-behavior.md) — when NCog works, when it's zero, how it's used (evolving)
 - [Curve Non-Convexity](findings/curve-non-convexity.md) — C5 sparse data artifacts (proven)
 - [Pump Switching Stability](findings/pump-switching-stability.md) — 1-2 transitions, no hysteresis (proven)
+- [Open Issues (2026-03)](findings/open-issues-2026-03.md) — diffuser, monster refactor, ML relocation, etc.
 
 ## Sessions
 - [2026-04-07: Production Hardening](sessions/2026-04-07-production-hardening.md) — rotatingMachine + machineGroupControl
 
+## Other Documentation (outside wiki)
+- `CLAUDE.md` — Claude Code project guide (root)
+- `AGENTS.md` — agent routing table, orchestrator policy (root, used by `.claude/agents/`)
+- `.agents/` — skills, decisions, function-anchors, improvements
+- `.claude/` — Claude Code agents and rules
+- `manuals/node-red/` — FlowFuse dashboard and Node-RED reference docs
+
 ## Not Yet Documented
 - Parent-child registration protocol (Port 2 handshake)
 - Prediction health scoring algorithm (confidence 0-1)
 - MeasurementContainer internals (chainable API, delta compression)
 - PID controller implementation
-- reactor / settler / monster / measurement nodes
+- reactor / settler / monster / measurement / valve nodes
 - pumpingStation node (uses rotatingMachine children)
 - InfluxDB telemetry format (Port 1)