fix(ci): stabilize nightly verification lanes

[mikemcdougall]

Pull Request

Issue Link

Closes #1372
Closes #1240

Summary

Stabilizes the nightly verification lanes and removes the unusable licensed ArcGIS Pro evidence workflow. Portal compatibility is verified through the maintained honua-esri-compat harness.

Changes Made

• Bound the nightly load-test database connection admission settings to the GitHub runner budget.
• Corrected migration approval resource nonces, Oracle field-name resolution, client-compat error expectations, and CITE WMS runner exit handling.
• Removed the unexecutable self-hosted ArcGIS Pro evidence workflow.

Testing

• Unit tests added/updated
• Integration tests added/updated
• Architecture tests pass
• Manual testing performed

Gate Impact

• PR gates (build, test, governance)
• Nightly gates (conformance, performance, security)
• Release gates (packaging, publishing)
• Deploy gates (promotion, post-apply validation)
• None — no gate impact

Docs or Contract Impact

• OpenAPI spec changed
• Protobuf/gRPC contract changed
• Control plane SDK surface changed
• Documentation updated
• None — no docs or contract impact

Release/Deploy Impact

• Requires coordinated release across repos
• Requires database migration
• Requires infrastructure changes
• Requires environment variable or secret changes
• None — standard merge-and-release flow

Breaking Changes

None

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Pre-PR Checklist

• Ran scripts/ci/pre-pr-check.sh and all checks passed (the script exceeded five minutes without output locally)
• Commit messages follow conventional format: type: description (#issue)
• PR title matches main commit message
• Issue number linked above
• Tests added for new functionality
• If protocol/auth behavior changed: updated compatibility contract
• If breaking admin/control-plane API changes: updated migration guide
• OPENAPI_BREAKING_CHANGE_APPROVED — intentional Admin API break acknowledged for this PR
• If breaking gRPC/proto wire changes: confirmed with explicit review