docs : Roadmap is outdated — missing 2025.H1/H2 columns

[shubhtrek]

The roadmap file docs/architecture/roadmap.md currently only includes roadmap columns for:

2023.H1
2023.H2
2024.H1
2024.H2

There are no roadmap entries or columns for 2025.H1/H2 even though new features and improvements have already been added to the project.

[shubhtrek]

/assign