chore(deps): Bump cryptography in /a2a/image_service

Bumps [cryptography](https://github.com/pyca/cryptography) from 48.0.0 to 49.0.0.
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@48.0.0...49.0.0)

---
updated-dependencies:
- dependency-name: cryptography
  dependency-version: 49.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

a2a/image_service/pyproject.toml

@@ -25,7 +25,7 @@ dependencies = [
     "orjson>=3.11.6",           # Indirect; prevents CVE-2025-67221
     "protobuf>=6.33.5,<7",      # Indirect; prevents CVE-2026-0994. Cap <7: opentelemetry-proto requires protobuf<7.0 (proto7 downgrades OTel and breaks startup)
     "pyasn1>=0.6.4",            # Indirect; prevents CVE-2026-30922
-    "cryptography>=48.0.0,<49", # Indirect; prevents CVE-2026-26007
+    "cryptography>=49.0.0,<50", # Indirect; prevents CVE-2026-26007
     "pyjwt>=2.13.0",            # Indirect; prevents CVE-2026-32597
     "langchain-classic>=1.0.8", # Indirect; prevents CVE-2026-45134
     "langsmith>=0.10.1",         # Indirect; prevents CVE-2026-45134