Drop tensorflow deps; rule cleanups; repo-mem MCP; bump pumpingStation@6ab585b

- package.json: remove @tensorflow/tfjs and @tensorflow/tfjs-node.
  Monster's TF code was already stripped; the deps were stale and kept
  pulling a heavy native binary back into every install.
- .gitignore: ignore .repo-mem/ regenerable indexes and per-session
  .claude/*.lock runtime files.
- CLAUDE.md: prepend READ-FIRST pointer to .claude/rules/repo-mem.md;
  collapse the 'three outputs' bullet to a pointer at node-architecture.
- .claude/rules/telemetry.md: drop Port 0/1/2 duplication; reference
  node-architecture.md.
- .claude/rules/testing.md: stop requiring a separate test/edge tier and
  the basic/integration/edge example flow trio. Reflects what nodes
  actually do.
- .claude/rules/repo-mem.md (new): when-to-call-which guide for the
  per-repo memory MCP, anti-patterns, refresh model.
- .mcp.json (new): wire repo-mem stdio server.
- docs/DEVELOPER_GUIDE.md (new): step-by-step guide for adding a new
  EVOLV node under the three-layer pattern.
- Bump nodes/pumpingStation to 6ab585b (docs + simulations refresh,
  spill-flow path renames consistent with d8490aa).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude/rules/testing.md

@@ -5,18 +5,18 @@ paths:
 
 # Testing Rules
 
-## 3-Tier Test Structure
-Every node must have:
-- `test/basic/*.test.js` — Unit tests for individual functions
+## Test Structure
+Every node has at minimum:
+- `test/basic/*.test.js` — Unit tests for individual functions (specificClass domain logic)
 - `test/integration/*.test.js` — Node interaction and message passing tests
-- `test/edge/*.test.js` — Edge cases, error conditions, boundary values
 - `test/helpers/` (optional) — Shared test utilities for this node
 
+Edge-case tests live wherever they fit (in `basic/` for pure-logic edges, in `integration/` for runtime edges). Don't require a separate `test/edge/` directory.
+
 ## Test Runner
 ```bash
 node --test nodes/<nodeName>/test/basic/*.test.js
 node --test nodes/<nodeName>/test/integration/*.test.js
-node --test nodes/<nodeName>/test/edge/*.test.js
 ```
 
 ## Test Requirements
@@ -25,11 +25,7 @@ node --test nodes/<nodeName>/test/edge/*.test.js
 - Example flows (`examples/`) must stay in sync with implementation
 
 ## Example Flows
-Each node must maintain:
-- `examples/README.md`
-- `examples/basic.flow.json`
-- `examples/integration.flow.json`
-- `examples/edge.flow.json`
+Each node should ship at least one runnable example under `examples/` plus an `examples/README.md` describing it. Beyond that, add only what the node's complexity demands — not every node needs separate basic/integration/edge flow files.
 
 ## No Node-RED Runtime in Unit Tests
 Basic tests should test specificClass domain logic without requiring a running Node-RED instance.