refactor(dashboard): refactor dashboard monolith to modules #417

Job	Run time
Template gates	52s
Dashboard scenario snapshots	33s
Python 3.12	1m 11s
Coverage	1m 26s
Python 3.13	1m 16s
Python 3.11	1m 9s
Validate vendored assets / Validate vendored third-party assets	35s
Validate runtime lock / Validate hash-pinned runtime dependencies	34s
	7m 36s

Provide feedback