refactor(cli): decompose render phases

[jrusso1020]

What

Decompose the CLI render command into explicit plan, execute, and present phases.

Why

The monolithic handler mixed validation, environment mutation, rendering, progress, cleanup, and output formatting, making lifecycle bugs and batch JSON corruption easy to introduce.

How

Build an immutable RenderPlan, keep environment changes declarative, execute through one lifecycle boundary, and make presentation emit exactly one final JSON document in batch mode.

Test plan

• Render-plan and presentation tests; complete CLI suite
• CLI build, typecheck, and stack-wide validation gates

[jrusso1020]

• refactor(repo): resolve changed-code audit #2174
• test(engine): isolate peer abort regression #2173
• refactor(cli): decompose render phases #2172 👈 (View in Graphite)
• refactor(cli): centralize process lifecycle #2171
• fix(cloudrun): publish adapter contract #2170
• test(repo): execute packed subpaths #2169
• refactor(repo): centralize package subpaths #2168
• refactor(core): own edit protocol contract #2167
• test(compiler): enforce preview render parity #2166
• refactor(studio): gate SDK operation families #2165
• refactor(studio): gate Acorn writer migration #2164
• refactor(producer): make capture plans immutable #2163
• refactor(producer): unify render requests #2162
• refactor(engine): type capture failures #2161
• refactor(engine): manage child process lifecycles #2160
• refactor(engine): add fingerprinted browser leases #2159
• refactor(render): centralize execution ownership #2158
• refactor(core): unify composition contract #2157
• fix(studio): enforce optimistic file concurrency #2156
• fix(studio): make sdk cutover transactional #2155
• fix(render): publish artifacts atomically #2154
• fix(render): surface structured outcomes #2153
• fix(player): own connection and media resources #2152
• fix(core): preserve runtime transport contract #2151
• fix(player): version runtime protocol #2150
• test(repo): verify packed consumers #2149
• test(repo): enforce workspace contracts #2148
• fix(core): enforce strict runtime safety #2147
• test(producer): gate source tests by execution lane #2146
• fix(core): make timing masks safe for source loaders #2145
• chore(repo): forbid tracked generated artifacts #2144
• main

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[miguel-heygen]

Approved exact head 3222f1f.\n\nAudited: the full 7-file diff, including the render transport adapter, plan/present/execute ownership split, batch JSON contract, compatibility re-exports, tests, all current issue comments/reviews/REST comments/GraphQL threads, and exact-head required CI.\n\nVerified the single and batch execution option payloads remain aligned with the prior handler; environment mutations are deferred without changing downstream reads; browser, lint, resolution, variables, and render dispatch ordering remains sound; Docker-only controls stay scoped; and the executable-boundary lifecycle contract remains intact. The strict quiet-lint refusal and exact integer validation are deliberate safety boundaries, not regressions. No blocking findings.\n\n— Magi