cam_hal/ll_cam: avoid ISR queue use-after-free; fully quiesce DMA on stop

[RubenKelevra]

PR requires the following PRs to be merged first, and thus contains their commits:

• fix jpeg soi check for psram_mode (DMA) #776
• fix jpeg eoi check for psram_mode (DMA) #777
• cam_hal: drop caches for psram_mode frames before hand-off to application #778
• rework psram_mode frame buffer overflow check #781
• cam_hal: psram: reset DMA and yield after NO-EOI to resume capture #783

Description

In PSRAM DMA mode the driver could dereference a deleted event queue and
leave EOF interrupts armed after shutdown, leading to late ISRs and NPDs.

Changes:

• ll_cam_send_event(): return early if event_queue is NULL; use a local
  woken and propagate to caller via hp when non-NULL.
• cam_deinit(): call cam_stop() before deleting queues; NULL out
  event_queue and frame_buffer_queue after vQueueDelete().
• ll_cam_stop(): disable all GDMA IN interrupts and clear them with a
  full W1C mask; stop CAM_START and halt link.
• ll_cam_start(): clear all interrupts, then enable only IN_SUC_EOF.
• ll_cam_dma_reset(): use 0xFFFFFFFF W1C mask for int_clr.
• ISRs (VSYNC/DMA): use hp variable and portYIELD_FROM_ISR() if set.
• cam_obj.state: mark as volatile.
• Headers: update ll_cam_send_event() signature to BaseType_t *hp.

Result: no null-pointer derefs or late interrupts after teardown; ISR
wakeups propagate correctly and the DMA path restarts cleanly.

Testing

Does fix some crashes, but not everything in psram_mode with JPEGs.

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Checklist

Before submitting a Pull Request, please ensure the following:

• 🚨 This PR does not introduce breaking changes.
• All CI checks (GH Actions) pass.
• Documentation is updated as needed.
• Tests are updated or added as necessary.
• Code is well-commented, especially in complex areas.
• Git history is clean — commits are squashed to the minimum necessary.

[me-no-dev]

@RubenKelevra please resolve the conflicts and update the branch with latest master

[RubenKelevra]

@me-no-dev this fix is not yet ready for prime time and is causing issues. I will work on it a bit more and then remove the draft mark.