Close the institutional gap: bodies, committees, leadership

The seat data answered 'who represents this place?' but not 'who runs
this institution?' — the Speaker of the House existed only as the rep
for LA-4. This adds the missing axis of institutional power.

New Body entities (233): the U.S. House, U.S. Senate, Executive Office,
49 committees, 181 subcommittees — each with its leadership.

Federal people (532/542) enriched with bioguide IDs, leadership roles,
and committee seats, reconciled from congress-legislators by name.
Mike Johnson is now Speaker of the House, not just LA-4.

Sources ingested directly into the repo (repo-canonical): Atlas
supplied bodies/leadership/committee_memberships via congress-legislators,
committed raw in data/. build.py supersedes convert_officeholders.py and
reads all four inputs in one deterministic pass (byte-identical on rerun).

The 10 unenriched federal records are a finding, not a bug: vacancies,
the President, and ~5 seats where Atlas's roster disagrees with the
authoritative current roster — model-vs-reality discrepancies to surface.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

data/jurisdictions/us/people/john-b-larson.md

@@ -8,6 +8,16 @@ level: "federal"
 branch: "legislative"
 state: "CT"
 district: "Congressional District 1"
+committees:
+  - name: "House Committee on Ways and Means"
+    role: "member"
+    body: "us/bodies/house/committees/ways-and-means"
+  - name: "House Committee on Ways and Means - Social Security"
+    role: "ranking-member"
+    body: "us/bodies/house/committees/ways-and-means/subcommittees/social-security"
+  - name: "House Committee on Ways and Means - Trade"
+    role: "member"
+    body: "us/bodies/house/committees/ways-and-means/subcommittees/trade"
 tenure:
   start: "2025-01-03"
   current: true
@@ -20,11 +30,14 @@ ids:
   office: "c5f6ae0c-12d8-4ed1-a937-fc389717d541"
   tenure: "c01504fa-7b6c-49f1-a0b6-5cdaaf95bfcf"
   jurisdiction: "1ac29c0b-9de0-4e09-a8a9-29614ff22efe"
+  bioguide: "L000557"
 sources:
   - field: tenure
     source: "House Clerk XML 2026-06-10"
   - field: jurisdiction
     source: "Census 119th CD 500k"
+  - field: roles
+    source: "congress-legislators (unitedstates project)"
 confidence: official
 tags: [officeholder, federal, legislative, ct]
 timestamp: "2026-06-20"
@@ -34,9 +47,16 @@ timestamp: "2026-06-20"
 
 Current U.S. House of Representatives - CT-1 (Congressional District 1).
 
+## Committees
+
+- [House Committee on Ways and Means](/us/bodies/house/committees/ways-and-means.md)
+- [House Committee on Ways and Means - Social Security](/us/bodies/house/committees/ways-and-means/subcommittees/social-security.md) — **ranking-member**
+- [House Committee on Ways and Means - Trade](/us/bodies/house/committees/ways-and-means/subcommittees/trade.md)
+
 ## Sources
 
 - tenure: House Clerk XML 2026-06-10
 - jurisdiction: Census 119th CD 500k
+- roles: congress-legislators (unitedstates project)
 
 Generated from the Atlas officeholders v2 export (2026-06-20).