Add inventory-anchored scalar source claims

[jscott3201]

Summary

• add a pure internal projection from named scalar rows to caller-claimed Modelica class members
• anchor each claim to an exact release or development revision, inventory path, and Git blob
• require complete owner bindings and derive reverse source lookups from frozen ordered forward rows
• validate pins, inventory shape, class claims, member bindings, and named input before allocating output

Inventory membership verifies the snapshot, path, and blob only. Class and member names remain caller claims; this change does not parse Modelica declarations or define a public or persisted source map.

Schemas, registries, production routines, source spans, dependency closure, graph/CXF generation, semantic joins, and Engine or Studio changes remain deferred.

Validation

• python3 -m unittest tools.lint.tests.test_routine_resolution tools.lint.tests.test_routine_scalar_abi tools.lint.tests.test_routine_scalar_names tools.lint.tests.test_routine_scalar_source_claims -v (63 tests)
• python3 -m py_compile tools/lint/routine_scalar_source_claims.py tools/lint/tests/test_routine_scalar_source_claims.py
• python3 -m unittest discover -s tools/lint/tests -v (168 tests, pinned schema environment)
• python3 tools/lint/routine_schemas.py
• python3 tools/lint/routine_semantics.py
• python3 tools/lint/routines.py
• G36 source inventory check against both exact pinned source checkouts (431/693 files)
• cargo test --manifest-path tools/verify/Cargo.toml (11 tests)
• cargo run --quiet --manifest-path tools/verify/Cargo.toml -- --routines
• cargo run --quiet --manifest-path tools/verify/Cargo.toml -- --all
• python3 -m unittest discover -s tools/dataset_harness/tests -v (32 tests)
• exact tiny LBL FPU replay and assertions from verify.yml
• python3 tools/book/generate.py && mdbook build book with no tracked generated changes
• git diff --check

[jscott3201]

Immutable review cycle 1 targeted f66d44880a0da41f895f93f01aac118c00e9af24.

Both standard review lenses are blocker/major-clean. No findings were deferred. The verify and book checks completed successfully on the reviewed head.