chore(deps): bump libdatadog to 48da0d8 for client-computed header fix

[lucaspimentel]

Overview

Bump all libdd-* dependencies from db05e1f to 48da0d8 to pick up
libdatadog PR #2071, which fixes how
the datadog-client-computed-stats and
datadog-client-computed-top-level headers are parsed so the behavior matches the Go trace-agent.

Bottlecap consumes this exact path in bottlecap/src/traces/trace_agent.rs via
(&parts.headers).into(), so it directly benefits from the fix.

Adapting to breaking API changes between the two revisions

• libdd_capabilities HttpClientTrait was renamed to HttpClientCapability
  (updated http_client.rs and stats_flusher.rs).
• SendData::send now requires C: HttpClientCapability + SleepCapability, so
  implemented SleepCapability for HttpClient (backed by tokio::time::sleep,
  mirroring libdatadog's NativeSleepCapability).

Testing

Added Tier 0 coverage in trace_agent.rs pinning the new header-parsing
behavior at the (&headers).into() boundary handle_traces uses:

• truthy values (true, yes, t, 1) -> flag set
• false-like values (false, 0, f, F, FALSE, False) -> flag clear
• absent/empty -> clear
• client_computed_top_level no longer set by presence alone (pre-bump regression)

These would fail on the pre-bump rev (db05e1f), so they lock in the fix.

"Turns out yes means yes and false means false. Took a whole PR to teach the parser what every toddler already knows." — Claude 🤖

[datadog-prod-us1-4]

✨ Fix all issues with BitsAI

⚠️ Warnings

🚦 4 Pipeline jobs failed

DataDog/datadog-lambda-extension | integration-suite: [auth]     

See error

Failed to create ChangeSet due to existing resources conflicting with CloudFormation stack. Resources must have DeletionPolicy set to 'Retain' or 'RetainExceptOnCreate'.

DataDog/datadog-lambda-extension | integration-suite: [snapstart]     

See error

Failed to create ChangeSet due to existing resources that must retain the DeletionPolicy attribute for successful import. Resource: /aws/lambda/integ-7c77ad64-snapstart-java-lambda

DataDog/datadog-lambda-extension | publish layer e2e sandbox (amd64)     

See error

ThrottlingException: Rate exceeded during ListLayerVersions operation after maximum retries.

View all 4 failed jobs.

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