[STAC-25514] [stackstate-agent-integrations] Upgrade cryptography to 50.0.0

[kkaempf]

STAC-25514

Context

The VEX-aware dev-chart scan run 30886199319 found three newly published vulnerabilities in cryptography 48.0.1 inside stackstate-k8s-agent:9516cb41:

Severity	Finding	Fixed in
High	CVE-2026-69247 / GHSA-g6cj-pr64-35w5	50.0.0
High	CVE-2026-69249 / GHSA-jwv3-5hgf-82ww	49.0.0
Medium	CVE-2026-69248 / GHSA-m2h6-j472-rp4c	49.0.0

All three advisories were published on 2026-08-03. The same cryptography 48.0.1 package was already present in yesterday's agent image, so this is new disclosure/database data rather than a regression introduced by the new image.

Required work

The agent consumes StackVista/stackstate-agent-integrations tag 7.78.2-4. Its generated Python requirements pin cryptography==48.0.1.

1. Update the integrations requirement to cryptography 50.0.0, which covers all three fixes.
2. Regenerate the requirements/lock artifacts using the repo's normal workflow.
3. Run the Python integration and dependency tests.
4. Publish a new immutable 7.78.2-* integrations tag.
5. Hand the released tag to the downstream stackstate-agent subtask.

Acceptance criteria

• Published integrations tag resolves cryptography to 50.0.0.
• Tests pass.
• Release/tag and CI evidence are linked on this ticket.