refactor: route media subprocesses through adapter

[edhor1608]

Route ffmpeg and ffprobe calls through a shared adapter in media domain

Introduces media_process.ts with runFfmpeg and runFfprobe wrappers that delegate to an internal runMediaProcess utility, which calls Bun.spawnSync and returns typed string results for exitCode, stdout, and stderr.

Replaces direct Bun.spawnSync calls in export_image.ts, export_video.ts, media_inspector.ts, and objective_metrics.ts with calls to the new adapters, eliminating per-call Buffer-to-string conversions.

^{Macroscope summarized de61e94.}

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📥 Commits

Reviewing files that changed from the base of the PR and between 203fddd and de61e94.

📒 Files selected for processing (6)

• docs/repo_refresh_audit.md
• src/domain/export_image.ts
• src/domain/export_video.ts
• src/domain/media_inspector.ts
• src/domain/media_process.ts
• src/domain/objective_metrics.ts

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[edhor1608]

• test: update report workflow snapshots #55
• feat: add consistent cli help #54
• refactor: split media inspector parsers #53
• test: replace bulky pixel snapshots #52
• fix: cap benchmark confidence to measured evidence #51
• feat: add upload workflow report checks #50
• chore: quiet lint gate output #49
• test: isolate integration output files #48
• fix: validate config files deeply #47
• refactor: route media subprocesses through adapter #46 👈 (View in Graphite)
• refactor: share CLI argument parsing #45
• chore: replace legacy agent guide #44
• fix: load export profiles from module path #43
• chore: add repo refresh onboarding and CI #42
• fix: harden config and image helper loading #41
• main

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