feat: Update Mattermost sync command to fetch context into inbox only and add promote project context command

.opencode/commands/promote-project-context.md

@@ -0,0 +1,43 @@
+---
+description: Promote confirmed project facts from the inbox into Fidelity workspace memory
+---
+
+Promote confirmed Fidelity project context into the workspace.
+
+Read:
+
+@ai/AGENTS.md
+@ai/context/project.md
+@ai/state/current.md
+@knowledge/workspace-model.md
+@knowledge/communication-rules.md
+
+Today's log, if present:
+
+!`if [ -f ai/logs/$(date +%F).md ]; then cat ai/logs/$(date +%F).md; else echo "No log exists for today yet."; fi`
+
+Current Mattermost inbox, if present:
+
+!`if [ -f ai/inbox/mattermost-latest.md ]; then cat ai/inbox/mattermost-latest.md; else echo "No Mattermost inbox file is available."; fi`
+
+User direction or facts to promote:
+
+$ARGUMENTS
+
+Instructions:
+
+- Promote only confirmed project-relevant facts
+- Ignore tooling noise and sync status
+- Update the smallest correct set of files among:
+  - `ai/logs/$(date +%F).md`
+  - `ai/state/current.md`
+  - `ai/context/project.md`
+  - `ai/context/decisions/*.md`
+- Prefer concrete project updates over broad summaries
+- If a fact is still ambiguous, do not promote it
+
+Return:
+
+1. Updated files
+2. Promoted project facts
+3. Remaining uncertainty