fix(accruals): carry origin dimensions onto dissolution entries (#1419)

* fix(accruals): carry origin dimensions onto dissolution entries

A project-tagged deferred invoice line lost its dimensions bag on every
monthly dissolution: the schedule never stored the bag, so dissolution
lines booked untagged and the per-project P&L drifted from the origin.

Persist the merged bag (invoice default_dimensions with the item bag on
top, same merge the origin generators use) on accrual_schedules and
attach it to BOTH dissolution lines: both origin generators tag the
interim 17xx/29xx line too, so per-dimension views of the interim
account keep netting to zero. Pre-existing schedules stay at '{}' and
keep today's untagged behavior; backfill is a separate follow-up.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(accruals): let dissolutions post when the tagged dimension value is archived

Carrying the origin's dimensions bag onto dissolution lines pulled every
monthly periodisering into validateEntryDimensions. With dimensions_enabled,
a project archived after the origin invoice was booked made the validator
reject the dissolution: the accrual service caught the rejection, wrote
last_error and left the installment pending forever. The remaining months of
prepaid cost would never reach 5xxx/6xxx, the interim 17xx/29xx account would
stay overstated, and the trial balance still balances, so no year-end check
fires and the arsredovisning is filed with understated cost.

Add a second, narrow exempt set (DIMENSION_VALIDATION_EXEMPT_SOURCE_TYPES =
{'accrual'}) with an isDimensionValidationExemptSource() helper, and skip the
soft registry validation for it in createDraftEntry. A dissolution is the
mechanical continuation of an already-approved, already-posted decision: the
same category as a storno, which the engine already bypasses.

The tag is kept, never stripped: an archived value still exists in the
registry and the cost genuinely belongs to that project. The rules set
(required/default/fixed) stays untouched, and the other two
validateEntryDimensions call sites keep validating: updateDraftEntry is a
user edit of an editable draft, and replaceOpeningBalanceEntry rejects any
source_type other than opening_balance.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

types/index.ts

@@ -1722,6 +1722,11 @@ export interface AccrualSchedule {
   posting_floor_date: string
   status: AccrualScheduleStatus
   description: string | null
+  // Dimensions bag ({sie_dim_no: object_code}) copied from the origin line
+  // (invoice default_dimensions merged with the item bag); carried onto both
+  // dissolution lines. jsonb DEFAULT '{}'. Optional in TS for pre-migration
+  // fixtures.
+  dimensions?: Record<string, string>
   created_at: string
   updated_at: string
   // Relations