refactor: align backend summary types with ASAPPlanner

[zzylol]

Summary

Align ASAPQuery-backend terminology and domain types with the ASAPPlanner developer guide:

• use Planner SummaryFamilyType for the summary family
• use Planner SketchCategory only for query category
• use Planner SketchAlgorithm for an algorithm identity
• use Planner SketchKind only for the validated committed algorithm + parameters choice
• remove backend-owned SummaryKind, SummaryParams, and SketchKindHandle domain types
• remove the OTLP ingest-only SketchKind enum and carry Planner SketchAlgorithm directly
• move shared backend-only monitor/storage types into asap_types where Planner has no equivalent

The legacy protobuf SummaryParams / SketchKindHandle names and serialized sketch_kind keys remain only at compatibility boundaries. They are decoded immediately into the canonical Planner types, so this PR does not break deployed wire/config formats.

Runtime and E2E coverage

The migration also closes the frequency-oracle gap needed by the production E2Es:

• bind the conventional item="..." equality matcher to Planner SketchQuery::PointCount
• do not reinterpret ordinary spatial labels as sketch item keys
• allow process-local live accuracy overrides for explicit oracle contracts
• validate KLL, HLL, CMS, CountSketch, and DDSketch through production binaries with independent raw-data oracles

Data/oracle coverage:

• DDSketch: raw numeric values -> quantile oracle and instant/range endpoint consistency
• KLL: raw numeric values -> quantile oracle
• HLL: raw identifiers with duplicates -> exact distinct-count oracle
• CMS: repeated raw items across two windows -> total-frequency oracle
• CountSketch: repeated raw items across two windows -> keyed point-frequency oracle

CountSketch uses an explicit weaker test-only delta because the current packed-hash runtime cannot execute Planner default depth at the selected width; production defaults are unchanged.

Validation

• cargo check --workspace --all-targets
• cargo test --locked -p asap_types --quiet (43 passed)
• cargo test --locked -p control_plane --lib --quiet (615 passed)
• cargo test --locked -p data_plane --lib --quiet (935 passed)
• ASAP_E2E_CARGO_TARGET_DIR=$PWD/target ./scripts/e2e.sh sketch-oracles (5 production-binary oracle tests passed)
• ASAP_E2E_CARGO_TARGET_DIR=$PWD/target ./scripts/e2e.sh whole (controller -> backend -> OTLP -> PromQL passed)

Terminology reference: https://github.com/ProjectASAP/ASAPPlanner/blob/main/docs/developer_docs/ASAP-aware-mapping-developer-guide.md

Follow-up to #478.