score/time_slave: Create detailed design (comp_dd_sta) #88

What

Write the detailed design document for score/time_slave.

Create score/time_slave/docs/detailed_design/index.rst using the sphinx-needs comp_dd_sta directive (the docs folder exists but is empty). Decompose the component into units, document their responsibilities and interfaces, and connect every unit to requirements (:implements:) and architecture (:satisfies:). Cover both Linux and QNX platform variants explicitly.

Note: This ticket targets v0.10.

Units to cover: gPTP adapter (interfaces with gPTP daemon), PHC writer (adjusts system clock via PHC), platform abstraction layer (Linux vs QNX variants), application lifecycle.

Acceptance Criteria

• comp_dd_sta directive in place with :status: valid
• Platform variants (Linux/QNX) documented
• :implements: and :satisfies: links present for every unit
• req-Id traceability comments in source for every traced unit

References

• S-CORE Implementation & Detailed Design