fix(cli): advertise data ingest/data delete in runtime + help strings

[LukasWodka]

Summary

Several user-facing printed/help strings still advertised the old dataset push command name, which was renamed to data ingest (the old name is retained only as a deprecated alias). This updates the strings a customer actually sees to the canonical data ingest / data delete.

This is separate from the install-time messaging already fixed in #134.

Changes

File	Location	Before → After
internal/cli/cluster.go	success line (printed by cluster info/cluster doctor)	Ready for `tracebloc dataset push`. → Ready for `tracebloc data ingest`.
internal/cli/cluster.go	cluster Long help	next dataset push will target → next data ingest will target
internal/cli/cluster.go	cluster info Long help	jobs-manager Service the next dataset push → data ingest
internal/cli/ingest.go	ingest validate Long help	pre-flight before tracebloc dataset push → tracebloc data ingest

Deliberately left as-is

• Internal code comments referencing dataset push (e.g. cluster.go:18, root.go:134, and comments under internal/push/, internal/cluster/, etc.) — developer-facing, never printed.
• internal/cli/data_test.go alias-resolution test names ("dataset push alias resolves", "dataset rm alias resolves") — these deliberately assert the deprecated aliases still work.
• internal/cli/data_list.go:86 ("emit the dataset list as JSON") — reviewed and confirmed descriptive ("the list of datasets"), not a command reference.

Test plan

• go build ./... — clean
• go test ./internal/cli/... — passes (ok … 1.622s)

🤖 Generated with Claude Code

[LukasWodka]

👋 Heads-up — Code review queue is at 35 / 30

Above the WIP limit. The team convention is to review existing PRs before opening new work.

Open PRs currently in Code review (oldest first):

• averaging-service#143 — chore(release): promote develop → staging (week of 2026-07-06) · author: @aptracebloc · no reviewer assigned
• averaging-service#156 — feat(strategies): FedMedian Byzantine-robust aggregation (CLI: a mistyped subcommand (e.g. dataset pus) prints help and exits 0 instead of erroring #75) · author: @shujaatTracebloc · reviewer: @divyasinghds
• averaging-service#157 — feat(strategies): FedTrimmedAvg Byzantine-robust aggregation (CLI: a mistyped subcommand (e.g. dataset pus) prints help and exits 0 instead of erroring #75) · author: @shujaatTracebloc · reviewer: @divyasinghds
• averaging-service#158 — feat(strategies): Krum / MultiKrum Byzantine-robust selection (CLI: a mistyped subcommand (e.g. dataset pus) prints help and exits 0 instead of erroring #75) · author: @shujaatTracebloc · reviewer: @divyasinghds
• averaging-service#159 — feat(strategies): FedProx aggregation strategy (dataset push: --category help lists 5 of 9 categories, and unknown-vs-empty category errors give two different lists (one leaks unsupported segmentation) #74) · author: @shujaatTracebloc · reviewer: @divyasinghds
• averaging-service#160 — feat(strategies): FedOpt family — FedAdam / FedYogi / FedAdagrad (dataset push: --category help lists 5 of 9 categories, and unknown-vs-empty category errors give two different lists (one leaks unsupported segmentation) #74) · author: @shujaatTracebloc · reviewer: @divyasinghds
• backend#927 — feat(validators): schema check for tabular/text/token classification (#924 G2) · author: @divyasinghds · no reviewer assigned
• backend#931 — feat(validators): generic all-category checks + validation matrix (#924 Phase 0/G12) · author: @divyasinghds · reviewer: @saqlainsyed007
• backend#934 — feat(validators): column-level tabular/text schema diagnostics (#924 G3/G4) · author: @divyasinghds · no reviewer assigned
• backend#935 — feat(validators): time-series & survival temporal checks (#924 G8/G9) · author: @divyasinghds · reviewer: @saqlainsyed007

Pull from review before opening new work. (This is a nudge from the kanban WIP check, not a block.)