Use tool runtime metadata in agent loop

[chubes4]

Summary

• Replaces Data Machine core's hardcoded extension tool-name lists with generic runtime metadata on tool definitions/results.
• Uses duplicate_policy: repeatable to allow safe repeated inspection calls and completion_signal: progress to decide when missing completion assertions should nudge immediately.
• Marks successful daily memory writes as progress and updates smoke coverage with generic tool names.

Testing

• php -l inc/Engine/AI/ConversationManager.php
• php -l inc/Engine/AI/conversation-loop.php
• php -l inc/Engine/AI/Tools/BaseTool.php
• php -l inc/Engine/AI/Tools/Global/AgentDailyMemory.php
• php -l tests/agent-conversation-runtime-policy-smoke.php
• php tests/agent-conversation-runtime-policy-smoke.php
• git diff --check

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (GPT-5.5)
• Used for: Drafted the generic runtime metadata contract, implementation, and focused smoke test updates; Chris directed the architecture away from hardcoded extension names.