fix(solana): image submit timeout + no phantom booking on video edge 5xx (0.52.3)

[VickyXAI]

Hotfix for two defects in 0.52.2 (#159), found by the code review of #155.

1. The Solana image fix cut the paid submit off at 30s

#159 moved the Solana image rail onto solanaPaidAsyncPost but kept its 30s submit default (sized for video's 3–20s enqueue). The image route holds the paid POST up to ~30s and answers 202 + poll_url at the window's end — so the client aborted exactly when the job id was due, after the transfer settled. The fix never reached its target case, and renders finishing inline just past 30s (which 0.52.1 delivered) were lost too. Now SOLANA_IMAGE_SUBMIT_TIMEOUT_MS = 95_000, matching the account rail's submit timeout for the same window.

2. Edge 5xx on a Solana video submit booked a phantom charge

#159 left the tracker armed on any 502/503/504 at submit. Correct for image/music (settle at POST); wrong for video (settles on the completed poll). New option submitMaySettle (default true, conservative); video passes false.

Tests

• Helper: edge 502/503/504 × {default, submitMaySettle:false}
• Rail parity: image/music/video each hand the helper the right submitTimeoutMs / submitMaySettle
• 5 of the new tests fail against 0.52.2 source, all pass with the fix
• Full suite: 1327 pass, 0 fail; typecheck + build clean

Merging bumps to 0.52.3 and triggers publish.yml.

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