Consolidate Dependabot bumps: file-rotate, service-manager, sha2, reqwest, plotly, sysinfo

[daniel-thom]

Summary

Bundles six pending Dependabot PRs into one branch and fixes the breakage each one introduced.

Supersedes:

• Bump reqwest from 0.12.28 to 0.13.2 #136 — reqwest 0.12 → 0.13
• Bump plotly from 0.10.0 to 0.14.1 #158 — plotly 0.10 → 0.14
• Bump file-rotate from 0.7.6 to 0.8.0 #161 — file-rotate 0.7 → 0.8
• Bump service-manager from 0.7.1 to 0.11.0 #180 — service-manager 0.7 → 0.11
• Bump sysinfo from 0.29.11 to 0.38.4 #253 — sysinfo 0.29 → 0.38
• Bump sha2 from 0.10.9 to 0.11.0 #255 — sha2 0.10 → 0.11

Per-bump notes

• file-rotate 0.7 → 0.8: drop-in.
• service-manager 0.7 → 0.11: new required restart_policy field on ServiceInstallCtx.
• sha2 0.10 → 0.11: Digest::finalize() now returns hybrid_array::Array<u8, _>, which no longer implements LowerHex. All format!("{:x}", ...) sites switched to hex::encode(...); hex added as a workspace dep gated under the existing server/client features.
• reqwest 0.12 → 0.13: RequestBuilder::query is now behind the optional query feature; added it to the workspace dep.
• plotly 0.10 → 0.14: plotly_kaleido pulls in lzma-rust2 0.15 which requires crc <= 3.3, but sqlx-core resolves crc to 3.4. Pinned transitive crc to 3.3.0 in Cargo.lock.
• sysinfo 0.29 → 0.38: large API overhaul — RefreshKind::new → nothing; with_memory() now takes MemoryRefreshKind; the SystemExt/CpuExt/ProcessExt traits are gone (methods are inherent); refresh_cpu → refresh_cpu_all; global_cpu_info().cpu_usage() → global_cpu_usage(); refresh_processes() now requires ProcessesToUpdate::All + a remove_dead_processes: bool flag.

Test plan

• cargo fmt -- --check
• cargo clippy --all --all-targets --all-features -- -D warnings
• dprint check
• cargo build --all-features
• cargo build --release --bin torc
• cargo build --release --features server-bin --bin torc-server
• cargo build --release --features dash --bin torc-dash
• cargo build --release --features mcp-server --bin torc-mcp-server
• cargo build --release --features slurm-runner --bin torc-slurm-job-runner
• cargo test --lib --all-features — 400 passed
• CI green on Ubuntu + Windows
• Integration tests (require running server)

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