improve the speed of storage syncs via BLE

[TuEmb]

related to #3432

Improvements:

• changed minimum interval time to 7.5ms.
• changed the codec prio to 7 (same as other threads)
• removed 100ms delay in storage thread

[gemini-code-assist]

Code Review

This pull request aims to increase the speed of storage syncs over BLE by reducing the connection interval and removing a sleep in the data transfer loop. While these changes will likely improve throughput, they also introduce potential issues with power consumption and connection stability. My review includes two main points:

1. The new fixed, short connection interval is aggressive and may not be supported by all central devices, and will increase power draw. I've suggested using a range to provide more flexibility.
2. Removing the k_msleep can lead to a busy-wait loop when BLE buffers are full, which will also consume excessive power. I've recommended switching to a more efficient event-driven approach using callbacks and semaphores.

Addressing these points will help ensure the performance improvements don't come at the cost of significantly reduced battery life or connection reliability.

[TuEmb]

Tested on Iphone (still be able to live record):

Tested on Windows: