feat(personal): Sophia replaces Bourdain and Cousteau

Adds Sophia Petrillo (The Golden Girls) to the personal team and retires
Bourdain and Cousteau — a 2:1 merge, net -1 agent (10 -> 9 personal,
18 -> 17 total).

Why: the personal team casts fictional characters. Bourdain and Cousteau
are real people, one with significant baggage and one who died by suicide,
and neither had a dedicated MCP server or capability. Sophia is fictional,
plausibly owns both domains (an Italian grandmother knows food; tending
plants and the tank is housekeeping), and is the first personal agent to
actuate the house via the new Hecate MCP server.

Graph: Sophia inherits all 11 node types unchanged (Recipe, Restaurant,
Ingredient, Meal, Technique + Species, Plant, Tank, Garden, Ecosystem,
Observation). Uniqueness constraints are keyed on node label, not agent,
so there is no schema or data migration. Historical Note tags
(from:bourdain, to:cousteau) are deliberately left intact as an accurate
record. Schema bumped to 2.5.0.

Also:
- New docs/tools/hecate.md + prompts/tools/hecate.md, documenting the
  physical-actuation discipline (never guess a room or device slug) and
  stating plainly what Hecate cannot do yet: no sensor readings (Demeter
  is REST-only), no weather, and set_timer is routine-bound with no
  cancel — the conversational timer is coming to Daedalus.
- Shawn gains Periplus in the docs. The server was already wired in
  iolaus but never described in any prompt, so the model was handed a
  tool it was never told about — including the never-estimate-coordinates
  rule.
- Corrected stale counts (15/16/18 assistants -> 17) and the stale
  "Bowie's Domain" schema heading missed when David replaced Bowie.
- Removed utils/neo4j-schema-init.py.bak, a pre-Watson artifact.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

prompts/personal/garth.md

@@ -83,7 +83,7 @@ MCP tool discovery tells you what each tool does at runtime. The sections below
 
 The Neo4j graph is your **memory** — the long arc of Robert's financial life. Accounts, holdings, debts, goals, the budget trends across years. Without it, every conversation starts from scratch and you're guessing at net worth instead of computing it.
 
-The MCP exposes `read_neo4j_cypher` (queries) and `write_neo4j_cypher` (writes). The graph is shared across all 18 assistants — read broadly, write narrowly to your own node types.
+The MCP exposes `read_neo4j_cypher` (queries) and `write_neo4j_cypher` (writes). The graph is shared across all 17 assistants — read broadly, write narrowly to your own node types.
 
 #### Writeback discipline
 
@@ -354,9 +354,8 @@ You can read all personal-team nodes; primary writes go to your own.
 | **Hypatia** | Learning & Reading | Book, Author, LearningPath, Concept, Quote |
 | **Marcus** | Fitness & Training | Training, Exercise, Program, PersonalRecord, BodyMetric |
 | **Watson** | Relationships & emotional safety | Reflection, Value, Habit, LifeEvent, Intention, EmotionalMemory, RelationshipTheme, DialogueNote, DynamicPattern |
-| **Bourdain** | Food & Cooking | Recipe, Restaurant, Ingredient, Meal, Technique |
+| **Sophia** | Home, Food & Living Things | Recipe, Restaurant, Ingredient, Meal, Technique, Species, Plant, Tank, Garden, Ecosystem, Observation |
 | **David** | Arts & Culture | Music, Film, Artwork, Playlist, Artist, Style, Fashion |
-| **Cousteau** | Nature & Living Things | Species, Plant, Tank, Garden, Ecosystem, Observation |
 | **Garth** *(you)* | Personal Finance | Account, Investment, Asset, Liability, Budget, FinancialGoal |
 | **Cristiano** | Football | Match, Team, League, Tournament, Player, Season |