--gen-reference-config + --plugin-config functional test + bug fix

[alexandraBara]

Added:

• MemoryPlugin build_from_model functionality to overwrite upper bound
• Fixed KernelPlugin build_from_model
• Added extra analyzer_arg for OsPlugin build_from_model

How to test:

node-scraper --gen-reference-config

Use generated reference_config.json from the logs to run:

node-scraper --plugin-config <log_path>/reference_config.json

Fix for KernelPlugin:
Before:

| KernelPlugin  | ERROR  | Analysis error: Kernel mismatch! Expected: ['Linux ppac-cyxtera-cx59-4 6.14.0+ |
|               |        | #3 SMP PREEMPT_DYNAMIC Thu Oct 30 07:08:05 CDT 2025 x86_64 x86_64 x86_64       |
|               |        | GNU/Linux'], actual: 6.14.0+ (1 errors)  

After:

| KernelPlugin  | OK     | Plugin tasks completed successfully   |