fix(handlers): parse capture frame as float instead of int

[fank]

Summary

• Changed all 16 occurrences of strconv.ParseInt to strconv.ParseFloat for capture frame parsing
• The Arma addon sends capture frame values as floats (e.g., "1.988") but handlers expected integers
• The uint() conversion truncates the decimal portion as expected

Test plan

• Tests pass locally
• Deploy updated DLL and verify MARKER:CREATE events no longer fail with parsing errors

[github-actions]

Merging this branch will not change overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/OCAP2/extension/v5/internal/handlers	1.24% (ø)

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Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/OCAP2/extension/v5/internal/handlers/handlers.go	1.24% (ø)	9099	113	8986

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.