feat(routines): add rooted declaration pipeline

[jscott3201]

Summary

• add a capability-rooted declaration pipeline entry point
• preserve exact requirements, binding, source, and syntax errors in stage order
• share typed preparation and completion logic with the existing in-memory entry point
• apply one five-field limits value across source acquisition and syntax checks

Scope

The existing pipeline signature and error variants remain unchanged. This adds no CLI, schema, serialization, provenance validation, production artifacts, dependencies, or external-repository integration.

Validation

• cargo fmt --manifest-path tools/routine-compiler/Cargo.toml -- --check
• focused declaration-pipeline tests: 12 passed
• routine-compiler tests: 115 passed
• routine-compiler clippy with warnings denied
• repository lint tests: 189 passed; all production lints passed
• G36 source inventory: 431 release / 693 development files
• release declaration verifier and tools/verify: 12 passed
• routines/all verifier
• dataset harness: 32 passed; replay assertions passed
• book generation and build
• git diff --check

[jscott3201]

Consolidated review — cycle 1: PASS

Reviewed immutable head f53d870acf41a78d4b9b28e4f0d595acac58e6c2 against base ce9750e4abc1fd95019a8dd202cd302f4e2fe9a6.

Both independent review lenses are blocker/major-clean. No findings were confirmed or deferred. The stage order, error preservation, limits mapping, borrowed capability roots, existing in-memory API behavior, and bounded scope are supported by the implementation and focused tests.

Exact-head GitHub build and verify checks succeeded. Local focused, package, clippy, repository lint, inventory, verifier, dataset/replay, book, and diff gates also passed.