Python: feat(claude): bump claude-agent-sdk to 0.2.87 (#6248)

* feat(claude): bump claude-agent-sdk to 0.2.87

Upgrade claude-agent-sdk dependency from >=0.1.36,<0.1.49 to >=0.2.87,<0.3.

Changes:
- Bump version pin in pyproject.toml
- Add 'xhigh' effort level to ClaudeAgentOptions (Opus 4.7 specific)
- Expose new upstream SDK options: skills, session_id, task_budget,
  include_hook_events, strict_mcp_config, continue_conversation,
  fork_session
- Add TaskBudget type import
- Update uv.lock

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* chore: lower claude-agent-sdk floor to >=0.1.36

Keep the lower bound at 0.1.36 since the 0.1→0.2 transition was additive
and our code works on older versions as long as new options aren't used.
This avoids forcing unnecessary upgrades on existing users.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: replace TaskBudget import with inline type for SDK compat

TaskBudget was added in claude-agent-sdk 0.2.93 but does not exist in
0.2.87. Use dict[str, int] inline type instead so type checking passes
against 0.2.87. Lock file pinned to 0.2.87.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

python/packages/claude/pyproject.toml

@@ -24,7 +24,7 @@ classifiers = [
 ]
 dependencies = [
     "agent-framework-core>=1.6.0,<2",
-    "claude-agent-sdk>=0.1.36,<0.1.49",
+    "claude-agent-sdk>=0.1.36,<0.3",
 ]
 
 [tool.uv]