1.9.0: rename CLI script hyp->hyperping; incident chunking/guard; partial-batch errors

[KhaledSalhab-Develeap]

Summary

Corrective 1.9.0 release addressing the follow-ups from the adversarial review of PR #51, and properly documenting the breaking changes that shipped mislabeled in 1.8.0/1.8.1.

BREAKING — CLI script rename (fixes the review's C1)

1.8.1 added a hyp console script for the SDK CLI. hyp is the long-standing command of the separate hyperping-automation tool; with both installed, the SDK's script silently shadowed it (verified: broke hyp maintenance broadcast, CI jobs, runbooks, and exposed the SDK's unguarded write commands under a familiar name). Renamed to hyperping. (A console-script rename is breaking → 1.9.0, not 1.8.2.)

Incident chunking + guard (review M3)

Incidents attach statuspages the same way maintenance windows do, so a fleet-wide incident broadcast (~57 pages) hits the same silent >51 phantom.

• create_incidents() (sync + async): splits into ≤MAX_STATUSPAGES_PER_INCIDENT (51) chunks.
• create_incident() now raises HyperpingValidationError above the cap.
• The 51 cap for incidents is assumed identical to maintenance (same attach path) and not independently measured live — documented in code + CHANGELOG.

Partial-batch failures (review M1)

create_maintenance_windows / create_incidents now raise HyperpingPartialBatchError carrying the already-created objects (.created/.completed/.total) on a mid-batch failure, instead of discarding them and orphaning windows/incidents silently.

Docs (review H2)

CHANGELOG 1.9.0 has an Upgrade Notes section explaining the 1.8.0 Integration/EscalationPolicy/TeamMember model reconciliation (active removed, type→channel) and the 1.8.1 CLI addition — the breaking changes that were shipped without notes.

Tests

• Incident: over-cap guard, chunk-split (60→[51,9]), bad chunk_size, partial-failure.
• Maintenance: exactly-51 boundary (single window), partial-failure.
• Async: create_maintenance_windows + create_incidents chunking.
• 613 pass, 95% coverage, ruff + mypy clean.

Follow-up (separate repo)

hyperping-automation will bump to >=1.9.0, fix hyp release start --shared (review H1: unchunked create after pausing the fleet), add a CI smoke test asserting uv run hyp --help shows maintenance, and fix the _parse_datetime IL→UTC bug (review L5).