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.

scripts/slack/README.md

@@ -47,7 +47,7 @@ Use the OpenCode command `/slack-import ...` for the guided workflow.
 For very large multi-year exports, the importer is designed to be selective by default:
 
 - auto-detects channels whose names start with `fidelity` when no channels are specified
-- uses `AIW_CHANNEL_PREFIX` when set; otherwise defaults to `fidelity` for compatibility with this workspace
+- uses `AIW_CHANNEL_PREFIX` when set; otherwise defaults to `fidelity` for this workspace profile
 - auto-tunes the message limit based on archive size
 - when no date filters are provided, performs an initial full-history sweep across the detected `fidelity*` channels
 - preserves coverage across channels and years, not only recent history