feat: create materialized view API

[rpgreen]

• API and namespace stubs for new create_materialized_view API
• New REST route for materialized view refresh

[claude]

Claude Code Review

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[codecov]

Codecov Report

❌ Patch coverage is 26.08696% with 17 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
rust/lance-namespace-impls/src/rest_adapter.rs	31.57%	13 Missing ⚠️
rust/lance-namespace-impls/src/rest.rs	0.00%	2 Missing ⚠️
rust/lance-namespace/src/namespace.rs	0.00%	2 Missing ⚠️

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[jackye1995]

I checked this against .claude/skills/lance-namespace-enterprise/SKILL.md. The PR looks incomplete in three specific places:

1. Java propagation is missing. createMaterializedView is not added to java/src/main/java/org/lance/namespace/RestNamespace.java, java/src/main/java/org/lance/namespace/DirectoryNamespace.java, or java/lance-jni/src/namespace.rs. java/pom.xml also still pins lance-namespace-core / lance-namespace-apache-client to 0.7.5, so the new Java model types would not be available.

2. The Python dependency minimum should be bumped. python/python/lance/namespace.py now imports CreateMaterializedViewRequest / CreateMaterializedViewResponse, but python/pyproject.toml still allows lance-namespace>=0.7.5,<0.8. Environments with 0.7.5 or 0.7.6 already installed can fail importing lance.namespace; this should require the first version containing those models, apparently 0.7.7.

3. The RestAdapter create route is missing. The PR adds /v1/materialized_view/:id/refresh, but not /v1/materialized_view/:id/create or a handler that forwards to backend.create_materialized_view. A RestNamespace client talking to Lance's in-process RestAdapter would 404 on create.

[jackye1995]

looks good to me!