## Summary
- rename the `AlertManager` node role to `Scheduler` across Rust
services, jobs, protobuf bindings, UI labels, and tests
- emit `scheduler` as the canonical role name
- continue accepting legacy `alertmanager` and `alert_manager`
configuration values
- keep protobuf enum value `5` unchanged for wire compatibility
## Why
The role schedules and executes alerts, reports, pipelines, synthetics,
and other background work. `Scheduler` describes that broader
responsibility more accurately.
## Compatibility
- existing role configuration values remain accepted through parser and
serde aliases
- the protobuf numeric value remains stable
- coordinated changes are included in the Enterprise, Helm chart, and
documentation repositories
## Verification
- `cargo test -p config test_role`
- `cargo test -p openobserve-node`
- `cargo check -p openobserve-jobs`
- targeted web tests: 307 passed, 13 skipped
- Rust formatting and targeted Prettier checks
## What changed
Fixed three issues in the Trace Graph:
- **Multi-root traces no longer crash** — traces where root spans
belonged to distinct services, the same service, or had cyclic service
relationships now render correctly instead of showing an empty graph.
- **Overlapping node labels are truncated** — long service names in
chart nodes are capped at 24 characters with an ellipsis, preventing
overlap with the next tree level.
- **Tooltip now shows the service name** — the pattern node tooltip
header was missing the service name, making it impossible to seethe full
name of a truncated node on hover.
Also added `truncateText` utility to `zincutils.ts` and comprehensive
test fixtures covering all multi-root scenarios.
Hengfei Yang
Abhay PadamaniandClaude Opus 4.8
Omkar Kesarkhane