M7.2: share the loop's parts

Shared parts, not a shared scheduler (agreed): nisse-review will have its
own small scheduler; a common one waits until two exist to compare.

- nisse_core.loop.driver: the driver run, moved; the agent names its
  waiting tools per run (nisse-dev's are WAITING_TOOLS), and execution
  goes to any Executor (ToolOutcome moves with it).
- nisse_core.loop.tools: the tool helper and the tools any agent offers
  (notes, memory, memory_done, ask_expert); nisse_core.loop.expert.
- nisse_core.knowledge.handlers: Knowledge, the vault and memory as
  control tools, the index and prompt text, out of LoopAgent.
- nisse_core.config: file reading, references, people, tuning sections of
  the agent's own, LLM numbers, the vault.
- New core tests: a driver run with a non-workspace executor and the
  agent's own waiting set; Knowledge alone; the shared config pieces.

Docs: the Development Plan marks M7.2 done; Architecture Part L and the
nisse-core README name the new parts.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J5Utyfzw7gF7UhjRDEtjTk

scripts/benchmark.py

@@ -14,12 +14,13 @@ import os
 import sys
 from pathlib import Path
 
+from nisse_core.config import ConfigError
 from nisse_core.envfile import load_env_file
 from nisse_core.models.catalog import ModelCatalog
 from nisse_dev.bench.results import append, load, render, results_file, summarise
 from nisse_dev.bench.runner import agent_commit, run_task
 from nisse_dev.bench.tasks import load_tasks
-from nisse_dev.config import AgentConfig, ConfigError
+from nisse_dev.config import AgentConfig
 from nisse_dev.loop.build import build_host, make_llm_clients
 
 REPO = Path(__file__).resolve().parents[1]

scripts/probe_context.py

@@ -15,10 +15,11 @@ from pathlib import Path
 
 import httpx
 
+from nisse_core.config import ConfigError
 from nisse_core.envfile import load_env_file
 from nisse_core.models.catalog import ModelCatalog
 from nisse_core.models.probe import probe
-from nisse_dev.config import AgentConfig, ConfigError
+from nisse_dev.config import AgentConfig
 
 
 def main() -> int: