feat(net) Campaign CA CA2 #431: parse the inbound attribute/skill update family

The server's authoritative answers to a raise were dropped on the floor:
only the vitals pair (0x02E7/0x02E9) had parsers, so after any
RaiseAttribute/RaiseSkill/TrainSkill the client's stat model stayed
frozen at login's PlayerDescription — the root cause of #431's stale
derived skills and run speed. The GUI looked alive only because the
panel applies optimistic local raises.

New parsers with three-source-verified layouts (CA1 research doc §2.5/
§2.8): PrivateUpdateAttribute (0x02E3) and PrivateUpdateSkill (0x02DD —
the wire's ushort ranks + hardcoded adjustPP=1 pair and f64
lastUsedTime preserved exactly). WorldSession dispatches both as typed
events; LiveSessionEventRouter routes them into the J4 character owner's
LocalPlayerState like every other private update. The vestigial
PrivateUpdateSkillLevel (0x02DF) is deliberately unparsed — ACE has no
producer (verified).

OnAttributeUpdate now fans out to the derived-value observers, mirroring
retail's live-at-inquiry model (CACQualities::InqSkill 0x00592660 —
Set* writes raw, Inq* recomputes, notification carries no value): an
Endurance write notifies the Health AND Stamina vital observers (ACE
pushes only a Health record and its own comment says the client must
refresh both), Self notifies Mana, and every attribute write notifies
character-sheet consumers whose formula contributions just changed.
OnSkillWireUpdate preserves the login FormulaBonus — the wire record
carries no attribute contribution; CA3 replaces the cached field with
the live computation.

Also corrected while in the neighborhood: PropertyString.cs's comment
claimed opcode 0x02DD for PrivateUpdatePropertyString; ACE's enum says
0x02D5/0x02D6 (doc-only — nothing dispatched on either).

Conformance tests cover both layouts (including holtburger's golden
skill fixture with adjustPP=1), truncation/wrong-opcode rejection, the
Endurance/Self/Quickness fan-out contract, and FormulaBonus
preservation. Full hermetic suite 15,333 passed / 0 failed (one
load-sensitive transport flake observed on the first run, passed alone
and on the clean re-run — filed as #439 rather than chased).

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

src/AcDream.Core/Properties/PropertyString.cs

@@ -10,7 +10,7 @@ namespace AcDream.Core.Properties;
 
 /// <summary>
 /// AC's <c>PropertyString</c> property table — the numeric keys the server sends in
-/// <c>PrivateUpdatePropertyString (0x02DD) / PublicUpdatePropertyString (0x02DE)</c>
+/// <c>PrivateUpdatePropertyString (0x02D5) / PublicUpdatePropertyString (0x02D6)</c>
 /// and in the property bundles carried by <c>CreateObject</c> / <c>PlayerDescription</c> /
 /// <c>IdentifyResponse</c>. The CLR payload for this table is <c>string</c>.
 ///