fix(memory-integ): address capacity cap and update failures in tests

[Hweinstock]

Failing integ tests on main: https://github.com/aws/bedrock-agentcore-sdk-python/actions/runs/30303039785/job/90288106089.

Problem

Failing integ tests on main: https://github.com/aws/bedrock-agentcore-sdk-python/actions/runs/30303039785/job/90288106089 with two root causes:

• add_strategy(wait_for_active=True) only waited for the strategy to reach ACTIVE, but the memory itself could still be in UPDATING state. Consecutive add_strategy calls (as in test_add_strategy_immediately_after_another) would hit ValidationException: Memory is in transitional state UPDATING.
• CI account hit memory limit with 150.

Solution

After the strategy is confirmed ACTIVE, add_strategy now also checks the memory status and waits for it to return to ACTIVE using the existing _wait_for_memory_active utility.

Testing

• All 6 integ tests pass against dev account (previously test 4 failed consistently)
• Logs confirm the fix: strategy goes ACTIVE in 0.2s, then waits ~130s for memory to return to ACTIVE before proceeding

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@f1a7106). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/bedrock_agentcore/memory/controlplane.py	33.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #603   +/-   ##
=======================================
  Coverage        ?   89.03%           
=======================================
  Files           ?      103           
  Lines           ?     9134           
  Branches        ?     1381           
=======================================
  Hits            ?     8132           
  Misses          ?      649           
  Partials        ?      353           

Flag	Coverage Δ
unittests	89.03% <33.33%> (?)

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