v0.1.1 fix: punctuation-insensitive customer lookup + pin google-adk <3

[udtrad]

Summary

Two changes to the Acme Operations assistant:

1. Fix: customer names with punctuation now resolve. A name typed with trailing/embedded punctuation ("Soylent Corp.", "Globex Corp.") missed the ILIKE '%'||$1||'%' substring match, so the agent reported "not found" for a customer that exists. Both search_customers and get_open_issues now strip non-alphanumerics from both the column and the bound parameter before matching ($1 stays parameterised — no injection surface). MemoryStore.customer_key mirrors the same normalisation so the Redis cache key agrees with the DB lookup.

2. Harden: pin google-adk, document the SequentialAgent deprecation. SequentialAgent (used by the escalation skill) is @deprecated in ADK 2.5.0 in favour of Workflow — which is not yet exported from google.adk.agents and, per ADK's own note, cannot yet be used as an LlmAgent sub-agent. It is kept deliberately. Pinned google-adk>=2.5.0,<3 (was the loose >=1.0.0) so a future 3.0 can't silently remove the class and break the build. Rationale documented at the use site + README/architecture.

Why

The punctuation quirk was a real "customer not found" failure for valid input — a papercut on the core lookup path. And the dependency floor was loose enough that a routine re-lock could pull a version without SequentialAgent, breaking the build with no code change on our side.

Changes

• toolbox/tools.yaml — regexp_replace(name, '[^[:alnum:]]', '', 'g') on both sides of the ILIKE in search_customers + get_open_issues
• app/memory.py — new _normalize_customer_name; customer_key delegates to it
• pyproject.toml / uv.lock — google-adk>=2.5.0,<3; version 0.1.0 → 0.1.1
• app/skills/escalation.py, README.md, docs/architecture.md — deprecation rationale
• Tests: unit (test_customer_key_*), live (test_trailing_punctuation_resolves_customer), eval case (customer-name-with-trailing-punctuation)

Verification (run against the live stack — not fabricated)

• Unit: pytest tests/unit — all pass (TDD, RED → GREEN)
• Lint / type: ruff check app db tests eval clean; ruff format --check clean; mypy clean
• Direct SQL vs Postgres: old pattern for "Soylent Corp." → 0 rows; new pattern → resolves; unknown customer → still 0 rows (graceful-absence preserved)
• Live API: 7/7 including the new punctuation regression; real agent replies confirm "Soylent Corp." → Soylent Corp and "Globex Corp." → Globex Corporation, grounded in DB values
• Eval: 11/11, no regression (search, get_open_issues, both escalation cases, graceful-absence all pass)

Test plan

• CI green (Lint · Type · Test + Docker build)
• After merge, docker compose restart toolbox picks up the tools.yaml change (Toolbox reads --tools-file at startup)

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