upgrade to Golangci-lint v2; add lint to CI

[alexandear]

Summary

Add linting workflow and migrate Golangci-lint configuration to v2 (v1 is deprecated).

The upgrade reveals a few lint issues that I fixed as well:

• simplify slice initialization in various files
• replace interface{} with any in multiple locations

[Copilot]

Pull request overview

This PR upgrades the repository’s linting setup to GolangCI-Lint v2 and introduces a dedicated CI workflow to run linting on pushes/PRs to main, along with a set of mechanical code cleanups surfaced by the new lint rules.

Changes:

• Add a GitHub Actions workflow to run golangci-lint in CI.
• Migrate .golangci.yaml to the v2 configuration schema.
• Apply lint-driven refactors across the Go codebase (slice initialization simplifications, interface{} → any, minor formatting/IO improvements, and bodyclose suppressions where responses are closed indirectly).

Reviewed changes

Copilot reviewed 24 out of 24 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
resources/meta.go	Simplifies slice allocation in supported-versions formatting.
lib/proto/block.go	Simplifies slice allocations during block decode.
lib/column/tuple.go	Minor string formatting change for conversion error messages.
lib/column/nested.go	Simplifies slice allocation in DDL formatting helper.
lib/column/map.go	Simplifies slice allocation while parsing map types.
lib/column/json_reflect.go	Switches reflective map type from interface{} to any.
lib/column/json.go	Removes unused map lookup boolean in JSON object append path.
lib/column/ipv6.go	Import grouping + slice allocation simplifications in IPv6 append paths.
lib/column/ipv4.go	Slice allocation simplifications in IPv4 append paths.
lib/column/enum.go	Removes redundant break statements in a switch.
lib/column/array.go	Uses any for reflective “scan any” type.
lib/chcol/variant.go	Updates sql.Scanner signature to use any.
lib/chcol/json.go	Updates sql.Scanner signature to use any.
internal/cmd/release/main.go	Replaces WriteString(fmt.Sprintf(...)) with fmt.Fprintf(...).
conn_http_query.go	Adds //nolint:bodyclose annotation for a bodyclose false-positive site.
conn_http_exec.go	Adds //nolint:bodyclose annotation for a bodyclose false-positive site.
conn_http_batch.go	Adds //nolint:bodyclose annotation for a bodyclose false-positive site.
conn_http_async_insert.go	Adds //nolint:bodyclose annotation for a bodyclose false-positive site.
client_info.go	Simplifies slice appends using variadic ....
clickhouse_std.go	Simplifies nil/len check on address slice.
clickhouse_options.go	Simplifies nil/len check on address slice in defaults.
bind.go	Simplifies slice allocation in join helper.
.golangci.yaml	Migrates to GolangCI-Lint v2 schema; reorganizes enabled checks and exclusions.
.github/workflows/run-lint.yml	Adds a lint workflow running golangci-lint in CI.

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[kavirajk]

thanks @alexandear for the PR. Can you address few minor comments?

[Copilot]

Pull request overview

Copilot reviewed 254 out of 254 changed files in this pull request and generated 2 comments.

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[alexandear]

thanks @alexandear for the PR. Can you address few minor comments?

@kavirajk thank you for the review. Addressed comments.

[kavirajk]

Thanks @alexandear 👍 for addressing the remarks.

nit: avoid force pushing in the future once review is started. Makes it hard for reviewer to review only latest changes :)