fix(OMN-13670): floor cryptography>=48.0.1 in runtime builder — clear last Trivy HIGH (emergency prod recovery)

[jonahgabriel]

Context

EMERGENCY PROD RECOVERY — OMN-13670 follow-up (operator-authorized).

This is a surgical one-line hotfix completing the Trivy remediation started in PR #2128. PR #2128 cleared 4 of 5 HIGH CVEs (pyjwt, python-multipart, starlette via pyproject.toml floors; plus setuptools and protobuf via Dockerfile floors). One HIGH remains:

• GHSA-537c-gmf6-5ccf — cryptography 46.0.7 flagged by Trivy (ignore-unfixed: true); fixed in >=48.0.1.

This PR adds cryptography>=48.0.1 as a build-time pip floor in the BUILDER stage of docker/Dockerfile.runtime, matching the existing protobuf/setuptools floor pattern exactly.

This PR does NOT deploy, restart, or touch any cluster. The prod re-pin follows separately under OMN-13418 gating.

Changes

docker/Dockerfile.runtime — adds after the setuptools floor block:

# Security: upgrade cryptography to clear GHSA-537c-gmf6-5ccf (HIGH, fixed in >=48.0.1).
# cryptography 46.0.7 (from transitive deps) is flagged by Trivy scan (ignore-unfixed: true).
# Force upgrade here after all plugin installs to ensure the patched version is present.
RUN --mount=type=cache,target=/root/.cache/uv \
    uv-with-retry pip install "cryptography>=48.0.1"

Also includes yamlfmt and ruff format auto-fixes on pre-existing files (collateral cleanup).

dod_evidence

Evidence-Ticket: OMN-13670
Evidence-Source: OCC#3235
Evidence-Class: hotfix
Active-Hotfix-PR: #2131
hotfix-evidence: OCC-3235
backmerge: #2128

Local gate results (2026-06-28):

• uv run ruff format src/ tests/ && uv run ruff check src/ tests/ — 0 issues
• Dockerfile diff: adds exactly 6 lines matching the protobuf/setuptools floor pattern

Reconciliation Note

The node-migration-sync CI check is NOT a required status check for main merge (confirmed in PR #2128 reconciliation note — omnimarket dev leads main during active development). This hotfix targets main only for the Dockerfile change.

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