StorageProvider Phase 2: Add facade classes for Skills, Templates, and Log collections

[diberry]

Context

CollectionEntityMap registers Skills, Templates, and Log collections but no corresponding facade classes exist.

Problem

• AgentsCollection, DecisionsCollection, RoutingCollection, TeamCollection exist
• SkillsCollection, TemplatesCollection, LogCollection are missing
• The type map promises collections that can't be accessed via SquadState

Expected

Add facade classes for the remaining 3 collections and wire them into SquadState.

Files

• packages/squad-sdk/src/state/collections.ts
• packages/squad-sdk/src/state/squad-state.ts
• test/state/squad-state.test.ts

Source

Flight's Phase 2 review

[diberry]

Skills, Templates, and Log collection facades were shipped in the Phase 2 implementation. All 7 collections have facades and tests.