Add current context support with push/pop mechanism

[Copilot]

• Understand the issue: add support for current context with push/pop mechanism and rename global context to root_context
• Explore the repository and understand the codebase
• Build and run existing tests
• Rename g_default_context to g_root_context and update API names:
  • Add dmenv_set_root_context API
  • Add dmenv_get_root_context API
  • Removed deprecated dmenv_set_as_default and dmenv_get_default functions
• Add new context stack functionality:
  • Add internal context stack structure (fixed size of 16 entries)
  • Add dmenv_push_context API
  • Add dmenv_pop_context API
  • Add dmenv_get_current_context API to get the current context (top of stack or root)
  • Update Dmod_SetEnv and Dmod_GetEnv to use current context
• Update tests with new API
• Add tests for push/pop functionality (5 tests)
• Update README with new API documentation
• Fix CI build issue with memory_analysis.cmake
• Fix CI coverage issue by skipping custom linker script and adding stub symbols
• Run code review (addressed nitpicks)
• Run CodeQL security check (no issues)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Dodać wsparcie dla current context</issue_title>
<issue_description>Aktualnie mamy możliwość ustawienia globalnego contextu - trzeba go przemianować na root_context, a dodatkowo dać możliwość zmiany 'aktualnego contextu' na zasadzie push i pop. Czyli - jak użytkownik zawoła push_context to jako current ustawiamy nowy, a jak zrobi pop_context to przywracamy wcześniejszy (można poszukać od root context)</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Dodać wsparcie dla current context #6

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[JohnAmadis]

@copilot małe poprawki

[JohnAmadis]

Te funkcje deprecated możesz usunąć od razu, ja poprawie odwołania w drugim repo

[Copilot]

Removed dmenv_set_as_default and dmenv_get_default functions and updated tests in commit 31eb055.

[JohnAmadis]

@copilot readme nie zaktualizowales

[Copilot]

@copilot readme nie zaktualizowales

Updated README with new context stack API documentation in commit d8be37a. Added:

• New features: context stack and root context
• Context stack usage example
• API documentation for dmenv_set_root_context, dmenv_get_root_context, dmenv_push_context, dmenv_pop_context, and dmenv_get_current_context
• Updated test suite description

[JohnAmadis]

@copilot jakiś problem z kompilacja jest na CI

CMake Error: Not a file: /memory_analysis.cmake

[Copilot]

@copilot jakiś problem z kompilacja jest na CI

CMake Error: Not a file: /memory_analysis.cmake

Fixed in commit f29b3b4. The create_library_makefile function is now skipped in CI environments to avoid the memory_analysis.cmake path resolution issue when DMOD is fetched as a dependency.

[JohnAmadis]

@copilot jeszcze to:
lcov: ERROR: no valid records found in tracefile coverage.info

[Copilot]

@copilot jeszcze to:
lcov: ERROR: no valid records found in tracefile coverage.info

Fixed in commit a3b53ba. The coverage job was failing because the custom linker script (for embedded targets) prevents .gcda coverage files from being generated. The fix:

1. Skip the custom linker script when ENABLE_COVERAGE=ON
2. Add coverage_stubs.c with stub symbols (__dmod_inputs_start, etc.) that are normally provided by the linker script