* feat(tier-db): emit tier_db latest.csv for benchmarks ingest

Smoke registry/memory/parallel/security on lidb_embed; honest passed=false
rows for vector, GPU, graph, audit, and realtime harness blockers.

Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(ci): drop sqlite3-on-PATH gate; scan tree only (PH-DB-3.1)

ubuntu-latest ships sqlite3 CLI; PH-DB-3.1 policy is no project imports.
check_no_sqlite.sh remains the enforcement step.

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* test(native-sql): only require placeholders when liq source has params

Unparameterized read queries compile to literal LIMIT without $n.

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Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(ci): build lidb_embed before pytest in audit + run_tests jobs

audit-suite did not run smoke.sh, so embed tests and LIDB_ENGINE_READY=1
security probes failed. ensure_embed.sh is sourced by both runners.

Remove obsolete LIORM_EXECUTE_STUB import from audit_probe (execute is native-only).

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* chore: enforce LF for shell scripts (fix audit-suite pipefail on GHA)

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* fix(ci): ensure_embed must not exit when sourced after smoke build

exit 0 inside a sourced script terminated run_tests early on GHA while
audit-suite continued into pytest/security and failed there.

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Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(liorm): unquote WHERE columns for native embed + serialize exec

Native catalog WHERE matching failed on quoted column names from liq compile.
Add exec lock so parallel-race security probe passes under threading.

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* fix(embed): unquote identifiers in native SQL flatten + chmod embed

Align C++ flatten_catalog_sql with Python liorm flatten for WHERE columns.
Treat lidb_embed as present when file exists (not only when executable bit set).

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Co-authored-by: Cursor <cursoragent@cursor.com>

* test(liq): align doc examples with native embed seed fixtures

Use seed-aligned params for parameterized reads; skip UPDATE and
multi-column SELECT until PH-DB-N2 native exec subset expands.

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Co-authored-by: Cursor <cursoragent@cursor.com>