Add Linux desktop app exclusions to watcher config

[CalebisGross]

Summary

• VS Code (.config/Code/) was generating ~950 heuristic rejections per session from WebStorage, CacheStorage, QuotaManager, and log rotation
• GNOME shell was firing temp output stream events every few minutes
• All were caught by the heuristic filter but still wasted watcher → heuristic processing

Adds watcher-level exclusions so these events are never even seen:

• .config/Code/ — VS Code internal state
• .config/google-chrome/, .config/chromium/, .config/BraveSoftware/ — browser internals
• .local/share/gnome-shell/ — GNOME temp streams
• .local/share/Trash/ — trash operations
• /dconf/, /gconf/ — GNOME settings backends
• /pulse/, /pipewire/ — audio system state

Test plan

• Config change only — no code changes
• Restart daemon, verify VS Code/gnome-shell events no longer appear in log
• Verify legitimate filesystem events (project files) still get through

Related

• Part of the noise suppression work from Fix memory pipeline quality: ranking, LLM gating, decay, noise suppression #22 and the system audit
• Tier 1 of a 3-tier approach to intelligent exclusions: (1) ship smart defaults, (2) auto-detect at startup (Move evolution examples out of runtime directory #25), (3) adaptive learning from heuristic rejections (Add Linux desktop app exclusions to watcher config #26)

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