feat: implement TimeState storage for mission time sync

[fank]

Summary

• Add actual storage for :NEW:TIME:STATE: command (previously just acknowledged)
• Record mission time synchronization data: frame, system time, mission date, time multiplier, mission time
• Add TimeState model to core, GORM, and conversion layer
• Implement RecordTimeState in memory backend and storage interface

Test plan

• All existing tests pass
• Build succeeds
• Test with live Arma 3 mission recording

[github-actions]

Merging this branch changes the coverage (1 decrease, 2 increase)

Impacted Packages	Coverage Δ	🤖
github.com/OCAP2/extension/v5/cmd/ocap_recorder	0.00% (ø)
github.com/OCAP2/extension/v5/internal/handlers	1.21% (-0.03%)	👎
github.com/OCAP2/extension/v5/internal/model	0.00% (ø)
github.com/OCAP2/extension/v5/internal/model/convert	14.99% (+0.14%)	👍
github.com/OCAP2/extension/v5/internal/model/core	0.00% (ø)
github.com/OCAP2/extension/v5/internal/storage	0.00% (ø)
github.com/OCAP2/extension/v5/internal/storage/memory	16.18% (+0.04%)	👍
github.com/OCAP2/extension/v5/internal/worker	1.77% (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/cmd/ocap_recorder/main.go	0.00% (ø)	0	0	0
github.com/OCAP2/extension/v5/internal/handlers/handlers.go	1.21% (-0.03%)	9355 (+256)	113	9242 (+256)	👎
github.com/OCAP2/extension/v5/internal/model/convert/convert.go	14.99% (+0.14%)	874 (+12)	131 (+3)	743 (+9)	👍
github.com/OCAP2/extension/v5/internal/model/core/events.go	0.00% (ø)	0	0	0
github.com/OCAP2/extension/v5/internal/model/model.go	0.00% (ø)	473 (+13)	0	473 (+13)
github.com/OCAP2/extension/v5/internal/storage/memory/memory.go	16.73% (+0.04%)	1518 (+50)	254 (+9)	1264 (+41)	👍
github.com/OCAP2/extension/v5/internal/storage/storage.go	0.00% (ø)	0	0	0
github.com/OCAP2/extension/v5/internal/worker/worker.go	0.94% (ø)	635	6	629

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.

Changed unit test files

• github.com/OCAP2/extension/v5/internal/handlers/handlers_test.go
• github.com/OCAP2/extension/v5/internal/model/convert/convert_test.go
• github.com/OCAP2/extension/v5/internal/storage/memory/memory_test.go
• github.com/OCAP2/extension/v5/internal/worker/dispatch_test.go