refactor(kinetic): remove unused _parse_graph helper (SRP / dead code)

[MarcoPorcellato]

Problem

kinetic._parse_graph() parses files in isolation via LogosParser but is no longer called — scan, export, and visualize use LogseqGraph.load_directory / iter_canonical_pages() instead.

Dead code violates SRP (KINETIC still carries two graph-loading strategies) and confuses contributors reading kinetic.py.

Clean Architecture lens

Aspect	Assessment
Ring	Frameworks & Drivers (kinetic.py CLI)
Dependency rule	CLI should call one graph use-case entry (LogseqGraph.load_directory)
Uncle Bob	Boy Scout Rule — remove misleading paths

Proposed Solution

• Delete _parse_graph if truly unused (grep confirms only definition remains)
• If Progress-bar-only parsing is still needed, document why and add a single wrapper used by all commands

Files

• src/logseq_matryca_parser/kinetic.py

Definition of Done

• No dead graph-load helper
• make all passes