[AUTOMATION] feat: clean up internal decision handling

[michiosw]

Summary
This cleans up internal decision handling by routing allow and deny normalization through the existing shared helpers.

Before this, internal/hook/domain.go and internal/guard/store/sqlite/store.go each carried their own decision definitions or normalization logic, which made the same internal concept easy to drift.

Now internal decision handling has one canonical path:

risk.Decision input
-> hook.NormalizeDecision
-> canonical hook and sqlite storage values
-> consistent allow or deny output

Why
This gives kontext-cli a cleaner maintenance path for internal guard decision handling.

What changed
Consolidated the hook Decision type onto internal/guard/decision
Removed duplicated allow and deny normalization in the SQLite store
Added tests for mixed-case and whitespace-padded decision values

Verification
go test ./internal/hook ./internal/guard/store/sqlite ./internal/guard/app/server ./internal/guard/hookruntime
go test ./internal/guard/judge
go test ./...
git diff --check

[michiosw]

• [AUTOMATION] feat: clean up internal decision handling #293 👈 (View in Graphite)
• main

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[greptile-apps]

Greptile Summary

This PR centralizes internal guard decision normalization. The main changes are:

• hook.Decision now aliases the shared guard decision type.
• SQLite decision helpers now route allow and deny normalization through hook.NormalizeDecision.
• Tests cover mixed-case and whitespace-padded decision values.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
internal/hook/domain.go	Moves hook decisions onto the shared guard decision type while preserving normalization behavior.
internal/guard/store/sqlite/store.go	Uses the shared hook normalization helper while preserving fail-closed deny and unsupported adapter labels.
internal/guard/store/sqlite/store_test.go	Adds coverage for case and whitespace normalization through the SQLite helper paths.

_{Reviews (1): Last reviewed commit: "feat: clean up internal decision handlin..." | Re-trigger Greptile}