Add Chinese memory sector classification

[mameikagou]

What changed

• Add Chinese temporal and event patterns for episodic memories.
• Add Chinese fact and concept patterns for semantic memories.
• Add Chinese workflow and action patterns for procedural memories.
• Add Chinese feeling and preference patterns for emotional memories.
• Add Chinese reflection and learning patterns for reflective memories.
• Add focused tests for all five sectors, mixed-sector content, and explicit sector overrides.

Why

The rule-based sector classifier currently uses English-only patterns. Chinese memories therefore fall back to semantic even when they clearly describe an episode, procedure, emotion, or reflection. This also affects sector-specific retrieval and decay behavior.

Validation

• npm run typecheck
• vitest run tests/chinese_classifier.test.ts tests/multilingual_dedup.test.ts --maxWorkers=1 --no-file-parallelism
• vitest run tests/verify.test.ts --maxWorkers=1 --no-file-parallelism

All checks pass.