Refactor workspace structure and documentation

- Deleted obsolete files: obsidian-vault.md, onboarding.md, workspace-model.md
- Updated opencode.json to remove references to deleted files.
- Revised profile.md to clarify the status of legacy paths and communication evidence.
- Adjusted prompts to reflect new file paths and improve clarity.
- Enhanced daily logs with focus, work-items, and blockers properties.
- Updated work-item notes to include systems, workstreams, people, and related properties.
- Improved context maintenance guidelines to ensure accurate and durable project knowledge.
- Refined base filters to exclude template files and ensure only relevant notes are displayed.
- Updated daily templates to ensure proper formatting and consistency.
- Modified workflows to align with the new vault structure and improve context synchronization.

core/integrations/obsidian-model.md

@@ -48,7 +48,7 @@ Technical runtime remains outside the vault:
 - `scripts/*/generated/`
 - archives and local virtual environments
 
-Legacy `ai/context`, `ai/state`, `ai/work-items`, `ai/logs`, and `knowledge` paths may exist temporarily as compatibility fallback during migration.
+Communication evidence may exist under `ai/inbox/` or connector `generated/` folders, but promoted memory belongs in `vault/`.
 
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