docs(E1-12): register FuelEntryStateHolderTest SIGSEGV fix story for issue #42

[davidru85]

Summary

• Register GitHub issue [Bug]: FuelEntryStateHolderTest segfaults on iosSimulatorArm64 when the graph closes while collectors are live #42 as backlog story E1-12 (S, Phase 1, human-gated): the intermittent SIGSEGV on :shared:iosSimulatorArm64Test where FuelEntryStateHolderTest closes the AppGraph while collectors on runTest's backgroundScope are still subscribed, producing a use-after-free on Kotlin/Native. The fix is test-only; the D-89 production-safety question is deferred to its own gated story. Follows the E1-11 precedent (issue [Bug]: Vehicle cascade Fuel Entry tombstone omits entityType #36).

Story

E1-12 - FuelEntryStateHolderTest Kotlin/Native SIGSEGV on Graph Close

Ready Check

• Backlog story is explicit
• Acceptance criteria reviewed
• Dependencies checked
• Required decisions are not Proposed or Pending
• Normative sections reviewed
• Expected verification identified
• Human review gates identified before work

Scope Completed

• Add E1-12 story to docs/BACKLOG.md Phase 1, sized S, human-gated, registering issue [Bug]: FuelEntryStateHolderTest segfaults on iosSimulatorArm64 when the graph closes while collectors are live #42.
• Add execution-order line, rationale paragraph and story-index row.
• Update AGENTS.md remaining Phase 1 count (E1-10, E1-11, E1-12).
• Append correction entry to docs/PROJECT_LOG.md.

Acceptance Evidence

• Documentation-only change; no code, schema, contract or decision change introduced.
• Story acceptance criteria reference the exact paths and symbols from issue [Bug]: FuelEntryStateHolderTest segfaults on iosSimulatorArm64 when the graph closes while collectors are live #42 (FuelEntryStateHolderTest.kt, AppGraph.kt:139, StateHolders.kt:77, DatabaseFactory.kt:38).
• The D-89 production-safety deferral is recorded explicitly in the story body.

Out of Scope / Not Done

• E1-12 implementation (the test fix itself) remains open for a follow-up PR.
• Any production-code change to AppGraph.close(), StateHolders.close() or DatabaseFactory — deferred to its own gated story if pursued.

Files Changed

• docs/BACKLOG.md — new story, execution-order line, rationale, story-index row
• AGENTS.md — remaining Phase 1 count
• docs/PROJECT_LOG.md — correction entry

Decisions Made

Include any SHOULD you deviated from, and why.

• None. The story marks the AppGraph.close() safety question as a deferred decision, not a decision taken in this PR.

Verification Run

• Documentation updated if behaviour, decisions or models changed

Commands or checks run:

git diff --stat
 3 files changed, 81 insertions(+), 1 deletion(-)

No code, build, lint, coverage, architecture or contract check is affected by a documentation-only backlog registration.

Contract Impact

• No contract changes

Decision Board Impact

• No decision changes

Shared-Write Modules Touched

• None

Project Log Entry

• Entry appended to docs/PROJECT_LOG.md

Human Review Gate

Gates are defined canonically in AGENTS.md.

• Gated path (AGENTS.md, docs/BACKLOG.md is derived but AGENTS.md is gated)

This PR touches AGENTS.md (Repository State remaining-work count), which is a gated path.

Risks or Follow-ups

• E1-12 implementation is open and needs its own PR. It has no dependency on E1-11 and may run in parallel.
• The D-89 production-safety question (whether AppGraph.close() should be safe against live subscribers) is explicitly deferred and, if pursued, needs its own gated story touching core/database/**.
• Closes [Bug]: FuelEntryStateHolderTest segfaults on iosSimulatorArm64 when the graph closes while collectors are live #42 (backlog registration only; implementation remains open).