chore(submodule): bump backend to f3f42f8 and frontend to c70cde1

[juancobo]

Pins the small wave landed on both dev branches today.

• backend f3f42f8: NEH-162 (Make RAW capture verifiable to the user (capture-format feedback) #92) optional email, NEH-166 (Registry/calibration open a second PTP/libcamera claim on a held camera #93) inline test capture
• frontend c70cde1: NEH-162 (Registry/calibration open a second PTP/libcamera claim on a held camera #93), NEH-166 (gphoto2 capture has no timeout/watchdog; an AF/PTP hang freezes that camera #94)

Pointer bump only.

[Copilot]

🔵 Needs a closer look

Submodule pointer bumps can introduce substantial code changes that aren’t reviewable from this repo alone, so the underlying backend/frontend diffs should be reviewed/approved in their source repos before merging here.

Pull request overview

This PR updates the pinned submodule revisions for the backend and frontend to incorporate a set of changes that landed on their respective dev branches (referenced as NEH-162 / NEH-166 in the PR description). In the overall codebase, this functions as an integration step to pull those upstream changes into the main “software” repository without modifying code directly here.

Changes:

• Bump backend submodule pointer to f3f42f8.
• Bump frontend submodule pointer to c70cde1.

File summaries

File	Description
backend	Submodule pointer updated to backend commit f3f42f8.
frontend	Submodule pointer updated to frontend commit c70cde1.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 0
• Review effort level: Lite

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