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.

ai/inbox/README.md

@@ -6,6 +6,6 @@ Recommended usage:
 
 - `mattermost-latest.md` contains the most recent capture
 - timestamped snapshots can be stored here if needed
-- durable facts should be promoted into `ai/logs/`, `ai/state/`, or `ai/context/`
+- durable facts should be promoted into `vault/06-daily/`, `vault/01-current/`, `vault/02-work-items/`, `vault/03-context/`, `vault/04-people/`, or `vault/05-decisions/`
 
 This directory is intentionally treated as an inbox, not as the final source of truth.