fix(memory): pass through unknown config keys in _wrap_configuration

[jariy17]

Summary

_wrap_configuration only copies extraction, consolidation, and reflection keys into the wrapped config dict. Any other top-level key — like selfManagedConfiguration — is silently dropped. This makes it impossible to modify SELF_MANAGED strategies through modify_strategy() or update_memory_strategies().

Root Cause

_wrap_configuration builds a new wrapped_config dict and only populates it with keys it explicitly handles (extraction, consolidation, reflection). It never copies unknown keys, so they disappear before reaching the API.

Fix

Add a pass-through loop at the end of _wrap_configuration that copies any config keys not already in wrapped_config. This preserves selfManagedConfiguration (and any future unknown config keys) so they reach the API intact.

for key in config:
    if key not in wrapped_config:
        wrapped_config[key] = config[key]

Why this approach

• Runs per strategy — _wrap_configuration is called once per strategy in the modify loop, so there's no cross-contamination between strategies
• No behavior change for existing override types — extraction/consolidation/reflection are already in wrapped_config by the time the loop runs, so they're skipped
• Fails loud — if an unknown key is invalid, the API rejects it with a clear error. The alternative (Method 3: hardcoding selfManagedConfiguration) fails silent — future unknown keys get dropped with no error

Example

# This currently sends {} to the API (config silently dropped)
# After this fix, selfManagedConfiguration reaches the API intact
client.modify_strategy(
    memory_id="my-memory",
    strategy_id="self_managed_xyz",
    configuration={
        "selfManagedConfiguration": {
            "triggerConditions": [
                {"messageBasedTrigger": {"messageCount": 5}}
            ],
            "invocationConfiguration": {
                "topicArn": "arn:aws:sns:us-west-2:123:my-topic",
                "payloadDeliveryBucketName": "my-bucket"
            },
            "historicalContextWindowSize": 10
        }
    }
)

Test plan

• Existing _wrap_configuration tests pass (known override types still wrap correctly)
• New test: SELF_MANAGED with selfManagedConfiguration key preserved in output
• New test: known override type config unchanged (loop skips already-handled keys)

Relates to #212

[tejaskash]

LGTM