RDKEMW-16955: Log firebolt state of the app in OOMCrash plugin

[ks734]

Description

• OOMCrash plugin is now automatically enabled in DobbySpecConfig for every container, even if not explicitly configured in the app spec.
• The path field in the plugin schema is no longer required. When omitted, the plugin still detects and logs OOM events but skips crash-file creation.
• Replaced the memory.failcnt-based check with a multi-tier detection strategy using memory.oom_control:
  1. oom_kill > 0 — definitive OOM kill counter (kernel >= 4.13)
  2. under_oom > 0 — transient OOM flag fallback (kernel < 4.13)
  3. max_usage_in_bytes >= limit_in_bytes — persistent high-water-mark fallback (all kernels, catches cases where under_oom has already cleared)

Test Procedure

• Verify on kernel >= 4.13 (oom_kill counter present)
• Verify on kernel < 4.13 (falls back to under_oom / max_usage)
• Containers with no oomcrash config in their spec still get OOM detection and logging

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other (doesn't fit into the above categories - e.g. documentation updates)

Requires Bitbake Recipe changes?

• The base Bitbake recipe (meta-rdk-ext/recipes-containers/dobby/dobby.bb) must be modified to support the changes in this PR (beyond updating SRC_REV)

[Copilot]

Pull request overview

This PR extends the OOMCrash plugin so it can run without an explicit path, auto-enables it during spec generation, and changes OOM detection to use memory.oom_control plus usage-based fallbacks while logging Firebolt state.

Changes:

• Made OOMCrash path optional and skipped mount/crash-file setup when it is absent.
• Added automatic oomcrash plugin injection in DobbySpecConfig.
• Reworked OOM detection to parse memory.oom_control, add max-usage fallback checks, and log Firebolt annotations.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
rdkPlugins/OOMCrash/source/OOMCrashPlugin.h	Declares the new memory-limit helper used by OOM detection.
rdkPlugins/OOMCrash/source/OOMCrashPlugin.cpp	Implements optional-path handling, new OOM detection logic, and Firebolt state logging.
bundle/runtime-schemas/defs-plugins.json	Relaxes the OOMCrash schema so path is no longer required.
bundle/lib/source/DobbySpecConfig.cpp	Auto-injects the oomcrash RDK plugin into generated specs.

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