When using custom providers like LM Studio, Ollama, or DashScope,
token counts in /status show as 0 because the agent meta store
does not always have usage data populated for these providers.
Fix: set includeTranscriptUsage: true in both /status command and
the session_status tool. This enables the existing fallback path
that reads usage from the session transcript JSONL file when the
meta store has zero/missing token counts.
The merge logic already guards against overwriting valid data:
- totalTokens: only updated when zero or transcript value is larger
- inputTokens/outputTokens: only filled when zero/missing
- model/contextTokens: only filled when missing
Fixes#54995
97a8ba89fd