Bump the backend-dependencies group across 1 directory with 2 updates

[dependabot]

Updates the requirements on google-adk and a2a-sdk to permit the latest version.
Updates google-adk to 2.6.2

Release notes

Sourced from google-adk's releases.

v2.6.2

2.6.2 (2026-08-03)

Bug Fixes

• cli: update gcloud command to use beta flag (9630559)

Changelog

Sourced from google-adk's changelog.

2.6.2 (2026-08-03)

Bug Fixes

• cli: update gcloud command to use beta flag (9630559)

2.6.1 (2026-07-30)

Features

• add parent terminal grouping and TTL pruning to ADK CLI telemetry (99bbd83)
• capture TTY connectivity in CLI environment telemetry (c12a025)

Bug Fixes

• cli: implement early telemetry recording for long-running web servers and log successful exit code upon routine teardown (77726c5)
• Stop re-validating already-consumed tool confirmations (2b1204d)

2.6.0 (2026-07-29)

BREAKING CHANGES

• artifacts: namespace file artifacts by app (f72f0db)
• require patched async LangGraph runtime and update graph field type (551372b)

Features

• a2a: support per-invocation auth headers when fetching agent cards (3dd1156)
• add --extra_packages option to adk deploy agent_engine (93db97d), closes #3936
• Add ADK evaluation samples: shared home-automation agent (6ba41ef)
• add agent identity auth manager finalize endpoint for 3 legged OAuth flow with auth manager (8d2ded3)
• Add basic_criteria ADK eval sample (fdebd9d)
• Add bigquery-graph skill to ADK BigQuery tools (f1a0a14)
• add capability to log commands run in CLI (a58220c)
• Add custom_metric ADK eval sample (f71d9df)
• Add llm_judge_match ADK eval sample (0f0fa6b)
• add metadata extraction symmetry to A2A converters (3127f36)
• add opt-in final_response_tool_names to BigQueryAgentAnalyticsPlugin (07455ee)
• Add ReflectAndRetryModelPlugin for self-healing model errors (322f455)
• Add rubric_criteria ADK eval sample (852a66a)
• add state_delta support to LiveRequest for live mode (8219774), closes #4220
• add telemetry consent check, status commands, and interrupt safety to CLI (6bab08f)
• Add telemetry consent configuration endpoints and local writing utility (26f3d45)
• add telemetry metrics collection for ADK CLI execution (2280f1c)
• Add test_file_vs_evalset ADK eval sample (57a34ba)
• Add user_simulation ADK eval sample (481fe21)

... (truncated)

Commits

• 18e94c9 Update release version to 2.6.2
• 287d5f1 Update CHANGELOG for version 2.6.2
• 2d3e64e Bump version to 2.6.2
• b8b31c1 Update version.py
• 4d62253 fix(cli): update gcloud command to use beta flag
• 740582e chore(release/candidate): release 2.6.1 (#6528)
• 726172a feat: capture TTY connectivity in CLI environment telemetry
• 49dff7a fix(cli): implement early telemetry recording for long-running web servers an...
• 99bbd83 feat: add parent terminal grouping and TTL pruning to ADK CLI telemetry
• 2b1204d fix: Stop re-validating already-consumed tool confirmations
• Additional commits viewable in compare view

Updates a2a-sdk to 1.1.2

Release notes

Sourced from a2a-sdk's releases.

v1.1.2

1.1.2 (2026-07-20)

Features

• server: add aclose() to drain ActiveTask background tasks (#1101) (#1105) (9801f46)

Bug Fixes

• agent_execution: resolve ActiveTask 'destroyed but pending' warning during teardown (#1122) (d19c4d2)
• persist early producer failure as FAILED with originating message (#1106) (4e3d724)

Changelog

Sourced from a2a-sdk's changelog.

1.1.2 (2026-07-20)

Features

• server: add aclose() to drain ActiveTask background tasks (#1101) (#1105) (9801f46)

Bug Fixes

• agent_execution: resolve ActiveTask 'destroyed but pending' warning during teardown (#1122) (d19c4d2)
• persist early producer failure as FAILED with originating message (#1106) (4e3d724)

1.1.1 (2026-07-15)

Bug Fixes

• server: improve Swagger /docs example annotations for A2A routes (#1092) (46b292b)

Miscellaneous Chores

• grpc: eliminate third-party grpcio-status dependency (#1130) (723880e)
• http: eliminate httpx-sse dependency (#1132) (0d82ab9)

1.1.0 (2026-05-29)

Features

• server: restore FastAPI /docs visibility for A2A routes (#1024) (1122d4e)

Bug Fixes

• compat: remove ListTasks from v0.3 REST adapter (#1043) (#1068) (5c88793)
• properly convert metadata to dict in RequestContext.metadata (#1081) (d2f2e18)
• raise on append=True for unknown artifact_id (#1038) (#1077) (fe1f24b)
• release reference count on non-terminal exit to prevent stale registry entries (#1079) (501255c)
• server: preserve non-ASCII characters in streaming JSON responses (#1080) (d46c6f9)
• telemetry: don't mark QueueShutDown as an error span (#1075) (54a485c)

Documentation

• clarify EventQueue usage (#1066) (11dd68a)

Miscellaneous Chores

... (truncated)

Commits

• 3e6fa6a chore(main): release 1.1.2 (#1139)
• 9801f46 feat(server): add aclose() to drain ActiveTask background tasks (#1101) (#1105)
• d19c4d2 fix(agent_execution): resolve ActiveTask 'destroyed but pending' warning duri...
• 4e3d724 fix: persist early producer failure as FAILED with originating message (#1106)
• 86c6b0d chore(main): release 1.1.1 (#1103)
• 0d82ab9 refactor(http): eliminate third-party httpx-sse dependency (#1132)
• 723880e refactor(grpc): remove grpcio-status dependency (#1130)
• 343373b test: expand itk scenarios with ts java and rust agents (#1129)
• e7eafe3 chore(deps): bump cryptography from 48.0.0 to 48.0.1 (#1109)
• 46b292b fix(server): improve Swagger /docs example annotations for A2A routes (#1092)
• Additional commits viewable in compare view