driver: implement TCS driver for tarantool support

[bigbes]

• New Tarantool Config Storage (TCS) driver package (driver/tcs).
• Integration testing for TCS
• Updated .golangci.yml to fix needed packages and modify default testing rules.
• Modified core driver interfaces to be compatible with tcs.
• Update go module dependencies.

Closes #TNTP-4188

[Copilot]

Pull Request Overview

Introduce a new Tarantool TKV driver and align core interfaces and models to support it

• Add TKV driver with transactional execution and key watch support
• Adjust driver interfaces (Watch signature) and data models (KeyValue, RequestResponse) for compatibility
• Add integration tests against a Tarantool instance and update dependencies and lint configuration

Reviewed Changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
driver/tkv/tkv.go	Implements TKV driver Execute and Watch, wiring to Tarantool watcher API.
driver/tkv/txn.go	Defines request/response encoding/decoding and maps Tarantool responses to tx.Response.
driver/tkv/operations.go	Encodes operations (get/put/delete) for TKV.
driver/tkv/predicate.go	Encodes predicates and maps ops/targets to TKV equivalents.
driver/tkv/integration_test.go	Integration tests validating put/get/delete, predicates, multi-op, and watch behavior.
driver/driver.go	Changes Watch API to return a channel, a stop function, and an error.
driver/etcd/etcd.go	Updates Watch signature to match the new Driver interface.
watch/event.go	Simplifies Event to contain only Prefix.
tx/requestresponse.go	Refactors RequestResponse to hold a slice of KeyValue values.
kv/kv.go	Removes CreateRevision and Version fields; keeps ModRevision.
internal/mocks/driver_mock.go	Updates mocks to match the new Watch signature.
go.mod	Adds msgpack/v5 as a direct dependency.
.golangci.yml	Allows msgpack imports and tarantool packages in tests.

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[coveralls]

Pull Request Test Coverage Report for Build 19100749657

Details

• 185 of 969 (19.09%) changed or added relevant lines in 15 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-2.8%) to 21.09%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
driver/etcd/etcd.go	0	1	0.0%
driver/tcs/txn.go	31	35	88.57%
internal/mocks/driver_mock.go	0	8	0.0%
driver/tcs/predicate.go	34	44	77.27%
internal/testing/t.go	0	14	0.0%
driver/tcs/operations.go	31	47	65.96%
internal/testing/request.go	0	24	0.0%
internal/testing/response.go	0	40	0.0%
internal/testing/doerwithwatcher.go	0	44	0.0%
internal/testing/doer.go	0	47	0.0%

Totals
Change from base Build 18922966595:	-2.8%
Covered Lines:	360
Relevant Lines:	1707

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💛 - Coveralls

[Copilot]

Pull Request Overview

Copilot reviewed 14 out of 14 changed files in this pull request and generated 6 comments.

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[oleg-jukovec]

Please, rename TKV -> TcS or TCS everywhere.

[oleg-jukovec]

Please, update the CI impl commit title & message.

[oleg-jukovec]

It is a nice idea to start the CHANGELOG.md here. Or you could it fill on the first release. Up to you.

[Copilot]

Pull Request Overview

Copilot reviewed 32 out of 32 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull Request Overview

Copilot reviewed 32 out of 32 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 32 out of 32 changed files in this pull request and generated 1 comment.

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[oleg-jukovec]

Please, change the PR title: tkv-> TCS.

[elhimov]

Thanks for the patch! Please, see my comments.