fix(core): fix symbol reader lookups at minimal capacity

[bziobrowski]

Fixes hashing inconsistency between symbol reader and writer that makes reader lookups fail for some symbol values when capacity is low (e.g. 2) .

Example :

CREATE TABLE IF NOT EXISTS 'logs'
(
  'id'      symbol CAPACITY 2,
  'service' symbol CAPACITY 10 INDEX CAPACITY 12288,
  'level'   symbol CAPACITY 5 INDEX CAPACITY 2048,
  'source'  string,
  'message' string,
  'ts'      timestamp
) timestamp(ts) PARTITION BY month;

select id from logs where id = '10';
--returns no results 

[ideoma]

[PR Coverage check]

😍 pass : 1 / 1 (100.00%)

file detail

	path	covered line	new line	coverage
🔵	io/questdb/cairo/SymbolMapReaderImpl.java	1	1	100.00%