perf(ci): read the CI analytics from ci_runs and ci_jobs - #1719

🟢 Confidence 10/10 · safe to merge
Every CI read moves onto ci_runs/ci_jobs with OrgId intact, columns verified against migration 0047, and the numeric attempt/pull request conversion is pinned by the ClickHouse e2e and the servi…
_{no findings · tests covered · risk medium}

Moves every CI read (analytics page, PR sheet, ci_runs MCP tool) from raw traces to the ci_runs / ci_jobs projections, and lets attempt and pull request arrive as numbers. Parity holds and the missing-table case is handled; safe to merge once the 0047 tables are live.

• ci-runs.ts builders read CiRuns/CiJobs columns instead of traces attributes
• ciJobStatsQuery counts reruns as Attempt > 1 rather than run_attempt != '1'
• CiRunRow.attempt becomes a Number; the MCP tool and service drop their string parsing
• The ci_runs tool maps a missing table to McpUnavailableError with remediation

Before merge

• Warehouse · Deploy the schema before the code that reads it · packages/domain/src/tinybird/datasources.ts
• Manual · Deploy only after migration 0047 is applied: the CI page and the ci_runs tool now fail without ci_runs/ci_jobs
• Manual · Self-hosted ClickHouse orgs must apply the schema or the CI tab shows the warehouse config error

Production impact

_{fa3ad2b · Updated on every push. Reply "won't fix" to dismiss a finding, or mention @maple-review-bot to ask about one.}