Multi-bridge Phase 2.2: Re-key AppStore by BridgeID

[tashda]

Why

Today every collection in AppStore is flat (devices, groups, bridgeInfo, deviceStates, etc.). To hold both bridges' data simultaneously, every collection needs a bridge dimension. This is the largest pure-refactor of Phase 2.

What

Convert collections in Shellbee/Core/Store/AppStore.swift:

• devices: [Device] → devices: [BridgeID: [Device]]
• groups: [Group] → [BridgeID: [Group]]
• bridgeInfo: BridgeInfo? → [BridgeID: BridgeInfo]
• bridgeHealth: BridgeHealth? → [BridgeID: BridgeHealth]
• deviceStates: [String: [String:JSONValue]] → [BridgeID: [String: [String:JSONValue]]]
• deviceAvailability: [String: Bool] → [BridgeID: [String: Bool]]
• otaUpdates: [String: OTAUpdateStatus] → [BridgeID: [String: OTAUpdateStatus]]
• logEntries: [LogEntry] → LogEntry gains a bridgeID field; the array stays flat (so the master Logs view can show all-bridges-merged), but every consumer can filter by bridge.
• operationErrors, pendingRenames, pendingRemovals, identifyInProgress, touchlinkDevices → all bridgeID-keyed.
• deviceFirstSeen — already per-bridge from Implement stateful Z2M engine and enhance UI test coverage #1.4.

Add accessors:

• devices(for: BridgeID) -> [Device], device(named: in: BridgeID), state(name: in:), isAvailable(_: in:), groups(for:).
• Aggregations for "all bridges" views: allDevices, allLogs.

apply(_:) in AppStore+Events.swift takes a BridgeID (or ScopedEvent) and routes mutations to the correct slot.

reset() becomes reset(bridge: BridgeID) and resetAll().

Files

• Shellbee/Core/Store/AppStore.swift
• All Shellbee/Core/Store/AppStore+*.swift extensions.

Verification

• Unit-test that apply(event, bridge: A) does not mutate any slot keyed under bridge B.
• Confirm resetAll() clears all slots; reset(bridge: A) clears only A's slots.
• Build the app; Add CI, release workflow, and bump version to 1.1.0 #2.3 will rewire UI consumers.

Phase

Phase 2 of multi-bridge support. Depends on #2.1.

[tashda]

Implemented in f20e98c (Merged-bridge accessors and BridgeBadge component) with aggregation tests in 01e3087 (Tests for merged multi-bridge aggregation).