i2c eeprom auto-detect: per-chip detection logic

Chip	Size	Method	Logic
24X01	128B	1-byte mirror at 128	chip wraps at 128, reading there returns same 8 bytes as address 0
24X02	256B	ack_count=0, wrap test passes	only responds at base, burst read at 252 wraps at 256, bytes[4..7] match sig[0..3]
24X04	512B	ack_count=1, block-1 wraps	responds at base+1, block 1 is 256B with 1-byte addr, wrap test confirms small blocks
24X08	1KB	ack_count=3, block-1 wraps	responds at base+1..+3, same block-1 wrap logic as 24X04
24X16	2KB	ack_count>=7	responds at base+1..+7, no other chip uses 8 addresses, data-independent
24X32	4KB	2-byte mirror at 4096	chip wraps at 4096 in 16-bit address space
24X64	8KB	2-byte mirror at 8192	chip wraps at 8192
24X128	16KB	2-byte mirror at 16384	chip wraps at 16384
24X256	32KB	2-byte mirror at 32768	chip wraps at 32768
24X512	64KB	elimination	ack_count=0, wrap test fails, no ACK at base+8, mirror overflows 16-bit addr space
24X1025	128KB	ack_count=0, ACK at base+8	block select offset=3 puts upper bank at base+8, data-independent
24X1026	128KB	ack_count=1, block-1 does NOT wrap	block 1 is 64KB with 2-byte addr, wrap test fails, distinguishes from 24X04
24XM01	128KB	indistinguishable from 24X1026	same size, ACK pattern, and address structure, differs only in page size (write-only property)
24XM02	256KB	ack_count=3, block-1 does NOT wrap	block 1 is 64KB with 2-byte addr, wrap test fails, distinguishes from 24X08