Latvian citizenship is possible for the following categories of persons:
1) descendants of Latvian citizens;
2) descendants of exiled, deported, citizens who fled from Latvia;
3) descendants of ethnic Latvians.
You can be considered a descendant of a citizen of Latvia, but it is impossible to have dual citizenship with Israel on these grounds.
You cannot be considered a descendant of those who fled from the occupation, since you moved to Israel from the territory of Russian SFSR, not from Latvia.
You cannot be considered a descendant of an ethnic Latvian, taking into account your repatriation to Israel.
The restoration of Latvian citizenship is possible for persons who have lost Latvian citizenship against their will, being a minor, but this can be done between 18 and 25 years of age, anyway dual citizenship with Israel is not allowed.