Restructure obsy samples (#1654)

* restructure: move agentic-sales-analyst to agents-on-ecs; add agent-in-lambda sample

- Move observability-fullstack-examples/agentic-sales-analyst → agents-on-ecs/agentic-sales-analyst (git rename preserves history)
- Restructure agents-on-aws-lambda into two subfolders:
  - 01-lambda-invokes-runtime/: existing Lambda→AgentCore runtime pattern
  - 02-agent-in-lambda/: new pattern — Strands agent wrapped inside Lambda with ADOT observability
- New 02-agent-in-lambda sample includes:
  - lambda_agent.py: Strands Agent handler
  - requirements.txt: strands-agents + aws-opentelemetry-distro
  - build.sh: SAM container build producing Lambda-compatible ZIP
  - images/: console screenshots for X-Ray, ADOT layer, env vars, permissions
  - README.md: step-by-step setup guide with console screenshots, env var table, IAM policy,
    and explanation of the Lambda-suppresses-spans problem with requirements for the
    Lambda-invokes-runtime pattern
- Add top-level agents-on-aws-lambda/README.md comparing both patterns

* fix 02-agent-in-lambda: use ADOT managed layer instead of bundling OTel via pip

- requirements.txt: remove aws-opentelemetry-distro; only strands-agents needed
- build.sh: remove opentelemetry-instrument copy step; ZIP contains only strands-agents
- lambda_agent.py: update docstring to reflect layer-based setup; clean up logging
- README.md: rewrite setup steps for managed layer approach:
  - add ADOT layer ARN table for all major regions (account 901920570463)
  - AWS_LAMBDA_EXEC_WRAPPER=/opt/otel-instrument (layer path, not /var/task/)
  - AGENT_OBSERVABILITY_ENABLED=true for Strands Gen AI spans
  - Option A (manual ARN) and Option B (Application Signals console toggle)
  - retain console screenshots, IAM policy, test CLI invocation, trace viewing steps
  - retain Lambda-invokes-runtime span-suppression pattern explanation

* fix(02-agent-in-lambda): ADOT OTel version fix, add CW span exporter, and evaluation pipeline

- Add aws-opentelemetry-distro to requirements.txt so the bundled OTel
  packages are compatible with the ADOT layer's startup code (fixes
  ImportError: cannot import name 'LogData' from opentelemetry.sdk._logs)
- Add _CWJsonSpanExporter to lambda_agent.py: writes each OTel span as a
  compact single-line JSON to stdout to the Lambda CloudWatch log group,
  enabling AgentCore batch evaluation to read Gen AI sessions without a
  separate /aws/spans sink
- Add deploy.py, invoke.py, evaluate.py, cleanup.py scripts
- evaluate.py: starts Builtin.GoalSuccessRate batch evaluation using the
  Lambda log group as the cloudWatchLogs data source
- Gitignore lambda_config.json (runtime artifact)

Tested end-to-end: 5 Lambda invocations then evaluation COMPLETED

* style: fix ruff lint errors in 02-agent-in-lambda (unused imports, f-string without placeholders)

* remove: delete 03-integrations/observability/simple-dual-observability

* style: ruff format agents-on-aws-lambda Python files

* restructure: rename 03-integrations/observability → 3p-observability

* remove: delete 3p-observability/simple-dual-observability

Author: BharathiSrini

.gitignore

@@ -301,4 +301,5 @@ plan/
 01-features/07-centralize-and-govern-your-ai-infrastructure/02-policy/test-results/
 
 # Browser test report cards
-01-features/03-connect-your-agent-to-anything/02-browser/TEST_REPORT_CARD.md
+01-features/03-connect-your-agent-to-anything/02-browser/TEST_REPORT_CARD.md
+**/lambda_config.json