chore(kv-router): remove native kv-indexer binary, use maturin-built one [DYN-2459]

[PeaBrane]

Remove the duplicate dynamo-kv-indexer binary from lib/kv-router and consolidate on the maturin-built binary in lib/bindings/python. Add test-endpoints feature to the Python bindings Cargo.toml so e2e tests can use the pre-built binary instead of cargo run.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation

  • Updated standalone indexer build instructions with new recommended command sequence and environment setup

• Refactoring

  • Reorganized standalone indexer build and deployment process for improved Python environment integration

• Features

  • Added test-endpoints configuration option for specialized indexer builds

[github-actions]

🌿 Fern Docs Preview: https://nvidia-preview-43866b21-be99-4fd2-b807-0faa355fb0ba.docs.buildwithfern.com/dynamo/dev

[coderabbitai]

Walkthrough

Refactors the standalone KV indexer build process from a Rust cargo binary to a Python binding built via maturin. Removes the CLI binary target from the kv-router crate, renames the indexer-bin feature to standalone-indexer, and updates documentation and tests to reflect the new build approach.

Changes

Cohort / File(s)	Summary
Build system updates lib/bindings/python/Cargo.toml, lib/kv-router/Cargo.toml	Added test-endpoints feature to Python bindings. Renamed indexer-bin feature to standalone-indexer in kv-router; updated test-endpoints feature dependency; removed tracing-subscriber optional dependency and the [[bin]] target for dynamo-kv-indexer.
Documentation docs/components/router/standalone-indexer.md	Updated build instructions from cargo-based binary build to maturin-based Python bindings build; added virtualenv installation note and test build hint.
Removed CLI implementation lib/kv-router/src/bin/kv_indexer/main.rs	Deleted entire standalone indexer CLI binary including Clap-based Cli struct and async main entry point with argument parsing and server initialization logic.
Test code updates tests/router/test_router_e2e_with_mockers.py	Removed dynamo-kv-router binary invocation from standalone indexer startup commands in both enter and launch_indexer methods.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Poem

🐰 The indexer hops to Python's way,
No Rust CLI to build today,
Maturin binds what once was free,
A hop, a skip, from src to PyPI! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is incomplete and does not follow the provided template structure with required sections (Overview, Details, Where should the reviewer start, Related Issues).	Restructure the description to match the template: add a clear Overview section, expand Details with specific file changes, specify where reviewers should start, and clarify any related GitHub issues.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: removing the native kv-indexer binary from lib/kv-router and consolidating on the maturin-built version in lib/bindings/python.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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📝 Coding Plan

• Generate coding plan for human review comments

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[coderabbitai]

🧹 Nitpick comments (1)

docs/components/router/standalone-indexer.md (1)

84-85: Consider adding a copy-paste test-build command.

Small doc polish: include an explicit command using --features test-endpoints to reduce ambiguity for test setup.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@docs/components/router/standalone-indexer.md` around lines 84 - 85, Add a
concrete copy-paste command showing how to install dynamo-kv-indexer into the
virtualenv for test builds that need pause/resume listener endpoints: include
the package name `dynamo-kv-indexer` and the `--features test-endpoints` flag in
the example so users can run it directly (e.g., show the full
pip/poetry/installation command variant you use in this repo). Place the command
immediately after the existing sentence mentioning `dynamo-kv-indexer` and
`--features test-endpoints` so readers have an explicit, ready-to-run example.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@docs/components/router/standalone-indexer.md`:
- Around line 84-85: Add a concrete copy-paste command showing how to install
dynamo-kv-indexer into the virtualenv for test builds that need pause/resume
listener endpoints: include the package name `dynamo-kv-indexer` and the
`--features test-endpoints` flag in the example so users can run it directly
(e.g., show the full pip/poetry/installation command variant you use in this
repo). Place the command immediately after the existing sentence mentioning
`dynamo-kv-indexer` and `--features test-endpoints` so readers have an explicit,
ready-to-run example.

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 137a1111-5d02-49bb-96a0-260680679b55

📥 Commits

Reviewing files that changed from the base of the PR and between bddaaa2 and a39c26f.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (5)

• docs/components/router/standalone-indexer.md
• lib/bindings/python/Cargo.toml
• lib/kv-router/Cargo.toml
• lib/kv-router/src/bin/kv_indexer/main.rs
• tests/router/test_router_e2e_with_mockers.py

💤 Files with no reviewable changes (2)

• tests/router/test_router_e2e_with_mockers.py
• lib/kv-router/src/bin/kv_indexer/main.rs