feat: wire up all Phase 2-6 features into daemon and config

Integrate all new features into the shared infrastructure:
- Config schema: add memory, discord, slack, process, web_search schemas
- Daemon wiring: memory store init, tool registration, channel adapters
- Orchestrator: memory injection into system prompt, extraction on compaction
- Agent: add setSystemPrompt() for dynamic prompt updates
- Channel/tool index: export new adapters and tool factories
- Add @slack/bolt, discord.js, turndown, linkedom, @mozilla/readability deps
- Update state.json with Phase 3b completion (494 tests passing)

src/tools/index.ts

@@ -3,7 +3,9 @@ export { ToolRegistry } from './registry.js';
 export type { AnthropicToolDef, OpenAIToolDef } from './registry.js';
 export { ToolExecutor } from './executor.js';
 export type { ToolExecutorConfig } from './executor.js';
-export { allBuiltinTools } from './builtin/index.js';
+export { allBuiltinTools, createWebSearchTools, createProcessTools, ProcessManager } from './builtin/index.js';
+export type { WebSearchConfig } from './builtin/web-search.js';
+export type { ProcessManagerConfig } from './builtin/process/index.js';
 export { shellExecTool } from './builtin/shell.js';
 export { fileReadTool } from './builtin/file-read.js';
 export { fileWriteTool } from './builtin/file-write.js';