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.

archives/slack/README.md

@@ -17,7 +17,8 @@ Optional:
 ## Important
 
 - The current importer works with the extracted export directory, not the zip directly.
-- Keep raw archive content here, not under `ai/` or `knowledge/`.
+- Keep raw archive content here, not under `ai/` or `vault/`.
+- Promote only curated, high-confidence facts into `vault/`.
 - This directory is ignored by git except for this README and `.gitignore`.
 
 ## Why Here