fix(agent-sessions): Mastra scorer runs are not agent sessions - #1140

🟢 Confidence 4/5 · likely safe to merge
The ingest tool-call/stamp changes and the session-rule HAVING are shared by ingest, the list, the facets and the Tools tile; the added e2e that proves the SQL was not run against ClickHouse.
_{quality 100/100 · no findings · tests partial · risk medium}

Drops Mastra scorer runs at ingest and narrows the "tool" span-name needle to spans that name no operation, plus a per-trace session rule (model call, tool call, named agent or session id) applied to the list, facets, distributions and the Tools tile. The three parts agree with each other on the rows I checked, so this is safe to merge.

• Scorer spans (mastra.span.type scorer_* or mastra.metadata.targetTraceId) return None from run_predicates, before the vendor lookup
• facts::is_tool_call and usage::named_like_a_model_call apply the name needle only when the operation is empty
• isSessionTraceCond added to indexTraces, the facets and ai-tools' traceFacts
• classifyAiSpan reads "tool" off the name only when no operation is named

_{9773e7b · Updated on every push. Reply "won't fix" to dismiss a finding, or mention @maple-review-bot to ask about one.}