Enable 13 more linters and fix all violations

[denik]

Changes

• Enable 13 additional golangci-lint linters and fix all violations. Intentional patterns (e.g. deliberate nil-error returns) are annotated with //nolint.
• Fix IPv6-unsafe host:port formatting in apps run-local config (fmt.Sprintf → net.JoinHostPort).
• Fix user-facing typos: "paramaters" → "parameters", "app app proxy" → "app proxy".
• Drop wastedassign linter — fully redundant with the already-enabled ineffassign.

Why

Follow-up to #4978. These linters catch real bugs at compile time (silently discarded errors, IPv6 breakage) and prevent future regressions.

Tests

No new tests. Validated with golangci-lint run ./.... One existing test assertion updated to match a corrected error string.

[github-actions]

Approval status: pending

/bundle/ - needs approval

19 files changed
Suggested: @pietern
Also eligible: @andrewnester, @shreyas-goenka, @lennartkats-db, @anton-107, @janniklasrose

/cmd/apps/ - needs approval

Files: cmd/apps/run_local.go
Suggested: @MarioCadenas
Also eligible: @pkosiec, @fjakobs, @jamesbroadhead, @Shridhad, @atilafassina, @keugenek, @arsenyinfo, @igrekun, @pffigueiredo, @ditadi, @calvarjorge

/cmd/auth/ - needs approval

Files: cmd/auth/describe.go
Suggested: @simonfaltum
Also eligible: @mihaimitrea-db, @tanmay-db, @tejaskochar-db, @hectorcast-db, @renaudhartert-db, @parthban-db, @Divyansh-db, @chrisst, @rauchy

/cmd/root/ - needs approval

Files: cmd/root/user_agent_command.go
Suggested: @simonfaltum
Also eligible: @mihaimitrea-db, @tanmay-db, @tejaskochar-db, @hectorcast-db, @renaudhartert-db, @parthban-db, @Divyansh-db, @chrisst, @rauchy

/integration/ - needs approval

Files: integration/libs/locker/locker_test.go
Suggested: @simonfaltum
Also eligible: @mihaimitrea-db, @tanmay-db, @tejaskochar-db, @hectorcast-db, @renaudhartert-db, @parthban-db, @Divyansh-db, @chrisst, @rauchy

/internal/ - needs approval

Files: internal/testcli/runner.go
Suggested: @simonfaltum
Also eligible: @mihaimitrea-db, @tanmay-db, @tejaskochar-db, @hectorcast-db, @renaudhartert-db, @parthban-db, @Divyansh-db, @chrisst, @rauchy

/libs/apps/ - needs approval

6 files changed
Suggested: @MarioCadenas
Also eligible: @pkosiec, @fjakobs, @jamesbroadhead, @Shridhad, @atilafassina, @keugenek, @arsenyinfo, @igrekun, @pffigueiredo, @ditadi, @calvarjorge

/libs/databrickscfg/ - needs approval

Files: libs/databrickscfg/ops.go
Suggested: @simonfaltum
Also eligible: @mihaimitrea-db, @tanmay-db, @tejaskochar-db, @hectorcast-db, @renaudhartert-db, @parthban-db, @Divyansh-db, @chrisst, @rauchy

/libs/env/ - needs approval

Files: libs/env/context.go
Suggested: @simonfaltum
Also eligible: @mihaimitrea-db, @tanmay-db, @tejaskochar-db, @hectorcast-db, @renaudhartert-db, @parthban-db, @Divyansh-db, @chrisst, @rauchy

/libs/filer/ - needs approval

Files: libs/filer/workspace_files_client.go
Suggested: @simonfaltum
Also eligible: @mihaimitrea-db, @tanmay-db, @tejaskochar-db, @hectorcast-db, @renaudhartert-db, @parthban-db, @Divyansh-db, @chrisst, @rauchy

/libs/git/ - needs approval

Files: libs/git/config_test.go
Suggested: @simonfaltum
Also eligible: @mihaimitrea-db, @tanmay-db, @tejaskochar-db, @hectorcast-db, @renaudhartert-db, @parthban-db, @Divyansh-db, @chrisst, @rauchy

/libs/log/ - needs approval

Files: libs/log/handler/friendly.go
Suggested: @simonfaltum
Also eligible: @mihaimitrea-db, @tanmay-db, @tejaskochar-db, @hectorcast-db, @renaudhartert-db, @parthban-db, @Divyansh-db, @chrisst, @rauchy

/libs/process/ - needs approval

Files: libs/process/stub.go
Suggested: @simonfaltum
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/libs/sync/ - needs approval

Files: libs/sync/diff.go, libs/sync/snapshot.go, libs/sync/snapshot_state.go
Suggested: @simonfaltum
Also eligible: @mihaimitrea-db, @tanmay-db, @tejaskochar-db, @hectorcast-db, @renaudhartert-db, @parthban-db, @Divyansh-db, @chrisst, @rauchy

/libs/template/ - needs approval

Files: libs/template/config.go
Suggested: @pietern
Also eligible: @andrewnester, @shreyas-goenka, @lennartkats-db, @anton-107, @janniklasrose

General files (require maintainer)

22 files changed
Based on git history:

• @pietern -- recent work in bundle/config/mutator/, ./, cmd/auth/

_{Any maintainer (@andrewnester, @anton-107, @pietern, @shreyas-goenka, @simonfaltum, @renaudhartert-db) can approve all areas.
See OWNERS for ownership rules.}