[Subramanian-K812]

Summary

Closes #229 — "Creates additional complex showcases that will combine
multiple Modules."

Adds 6 combined showcases that demonstrate two or three platform modules working
together, plus a platform_integration_tests/combined PIT package
that runs them in CI.

New showcases

Showcase	Modules	What it demonstrates
lifecycle_comm	score_lifecycle + score_communication	Launch manager starts and supervises com-api-example; process reaches Startup in ~5.5 s and shuts down cleanly
lifecycle_kyron	score_lifecycle + score_kyron	Launch manager supervises safety_task; self-terminating process reaches Startup in ~200 ms
lifecycle_time	score_lifecycle + score_time	Launch manager supervises vehicle_time; 7 time samples printed before clean SIGTERM shutdown
lifecycle_kyron_comm	score_lifecycle + score_kyron + score_communication	Launch manager supervises both safety_task and com-api-example concurrently
lifecycle_time_comm	score_lifecycle + score_time + score_communication	Launch manager supervises both vehicle_time and com-api-example concurrently
kyron_logging	score_kyron + score_log (baselibs)	Four async tasks run on the kyron runtime and emit structured log messages via score_log

PIT coverage

All six showcases are wired into //platform_integration_tests:pit
via a new //platform_integration_tests/combined package. Each test
asserts on output that only the working path produces:

Requirement IDs attached:

• stkh_req__execution_model__processes — lifecycle showcases
• stkh_req__time__vehicle_time_api — time showcases
• stkh_req__communication__inter_process — comm showcases
• stkh_req__execution_model__processes — kyron_logging

Key config fixes

All lifecycle configs use Native application type (binaries do not
call lifecycle_client::report_running()):

• vehicle_time — Native + shutdown_timeout: 2.0 (avoids SIGKILL before output)
• safety_task — Native + ready_condition: Terminated
• com-api-example — Native + is_self_terminating: true + ready_condition: Terminated (exits after 5 samples)

Other changes

• platform_integration_tests/combined/BUILD — attribute_plugin added so partially_verifies IDs are recorded in JUnit XML
• showcases/simple_lifecycle/BUILD — exports_files added; all new showcase BUILDs reference //showcases/simple_lifecycle:lifecycle_signal.sh instead of carrying their own copy

Test plan

• All 6 showcases build (bazel run --config=linux-x86_64 //images/linux_x86_64:image_load)
• All 6 showcases run and produce expected output (verified via docker run score_showcases:latest /showcases/bin/cli --examples='<name>')
• bazel test --config=linux-x86_64 //platform_integration_tests/combined (CI)

[github-actions]

The created documentation from the pull request is available at: docu-html

[PiotrKorkus]

also rebase

[PiotrKorkus]

also make directory combined/ as in platform_integration_tetsts and put all of them in it

[Subramanian-K812]

Moved all combined showcase PITs into platform_integration_tests/combined/