feat(client): add map observation recorder

[blakinio]

Scope

Implements P1 of OTS-20260813-world-reconstruction-navigation: a disabled-by-default, local-only recorder for deterministic Map Observation Contract v1 JSONL artifacts derived from already-decoded OTClient Map/Tile state.

Boundaries

• no packet reparsing, OTBM mapping, navigation control, remote transport, credentials, or proprietary assets;
• does not overlap Track B PR feat(lab): add isolated Tibia Global login analysis project #284 paths or runtime namespace;
• native-Linux runtime E2E will run only after the task proves its own isolated namespace is available.

Dependency

P0 contract merged as 005158b5b9bf25fe77bd5fc10813a6388a072836 (#291).