BE: Full text search support

[germanosin]

• Breaking change? (if so, please describe the impact and migration path for existing application instances)

What changes did you make? (Give an overview)

Is there anything you'd like reviewers to focus on?

How Has This Been Tested? (put an "x" (case-sensitive!) next to an item)

• No need to
• Manually (please, describe, if necessary)
• Unit checks
• Integration checks
• Covered by existing automation

Checklist (put an "x" (case-sensitive!) next to all the items, otherwise the build will fail)

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (e.g. ENVIRONMENT VARIABLES)
• My changes generate no new warnings (e.g. Sonar is happy)
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged

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[fallen-up]

@germanosin
is the option KAFKA_FTS_ENABLED: "true" enough for testing?

[germanosin]

@germanosin is the option KAFKA_FTS_ENABLED: "true" enough for testing?

Yes correct, and you could adjust WITH
KAFKA_FTS_TOPICSMINNGRAM, KAFKA_FTS_TOPICSMAXNGRAM for topics index
KAFKA_FTS_FILTERMINNGRAM, KAFKA_FTS_FILTERMAXNGRAM for other searches

[germanosin]

@fallen-up new config:
KAFKA_FTS_TOPICS_NGRAM: true / false
KAFKA_FTS_TOPICS_NGRAM_MIN: 3
KAFKA_FTS_TOPICS_NGRAM_MAX: 5