feat: report durable full-pipeline source progress

[jmagar]

Summary

• make source progress runner-owned and durable for every adapter, with optional fine-grained adapter snapshots
• report canonical counts across discovering, diffing, fetching, enriching, normalizing, preparing, batching, embedding, vectorizing, upserting, publishing, and completion
• project canonical source kinds and phase-aware progress through CLI, JSON status, MCP task payloads/notifications, events, and provider heartbeats
• add graceful progress-persistence degradation, structured warnings, redaction-aware vector counts, and embed=false phase correctness
• split the touched orchestration, vectorization, reservation, and fake-store inspection code to satisfy the monolith policy without allowlist additions
• bump the synchronized CLI release version to 7.2.7 and regenerate OpenAPI/public-API artifacts

Verification

• cargo fmt --all -- --check
• cargo clippy --all-targets --locked -- -D warnings
• cargo test --no-run --workspace --lib --locked
• adapter fallback and 22 web acquisition tests
• coordinator, vectorization, event, service projection, job store, CLI, API, MCP, and web transport suites
• deterministic 130-file multi-acquisition-batch and multi-embedding-batch integration test
• embed=false integration regression
• npm web lint and production build
• cargo xtask check
• cargo xtask check-fetch-divergence
• cargo xtask check-crate-contracts
• cargo xtask check-release-versions --base origin/main --head HEAD --mode pr
• pre-commit and pre-push hooks

Closes #494