Batch LLM calls per account; add 5 pilot accounts

- Relevance filter: evaluate all of an account's signals in one LLM call
  (keyed array, chunked at 8) instead of one call per signal.
- Synthesizer: produce all of an account's briefs in one call (one object
  per capability) instead of one call per capability. ~2 calls/account.
- llm: wrap JSONDecodeError in LLMError so callers fall back to mock instead
  of crashing; disable Gemini thinking (thinkingBudget=0) to stop thinking
  tokens truncating JSON; add 429 backoff.
- accounts: add Booz Allen, Dominion Energy, Hope Gas, Markel, GW Medical
  Faculty Associates (verified domains; CRM tier captured in crmTier).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

sales-agent/data/accounts.json

@@ -1,5 +1,5 @@
 {
-  "_note": "Pilot target list (7 accounts; ~200 total to come). REAL fields: accountName, domain, industry. PLACEHOLDER fields to confirm from CRM/install-base: accountTier, assignedRep, currentProducts (drives anti-signal suppression — empty here means nothing is suppressed yet), targetContacts (empty; the LLM/signal authors identify the ideal contact, CRM enrichment fills the rest).",
+  "_note": "Pilot target list (~200 total to come). REAL fields: accountName, domain, industry, crmTier (verbatim CRM tier where known). crmTier->accountTier mapping used by the 3-band scorer: Tier 1->strategic, Tier 2->enterprise, Tier 3->growth, Tier 4->growth (NOTE: Tier 3 & 4 currently collapse to the same scoring weight — extend scorer to 4 bands to distinguish). PLACEHOLDER fields to confirm from CRM/install-base: assignedRep, currentProducts (drives anti-signal suppression — empty means nothing suppressed yet), targetContacts (empty; LLM/signal authors identify the ideal contact, CRM enrichment fills the rest).",
   "accounts": [
     {
       "accountId": "acct_lowes",
@@ -77,6 +77,66 @@
       "currentProducts": [],
       "targetContacts": [],
       "lastRunAt": null
+    },
+    {
+      "accountId": "acct_booz_allen",
+      "accountName": "Booz Allen Hamilton",
+      "domain": "boozallen.com",
+      "industry": "Consulting & Government Services",
+      "crmTier": "Tier 3",
+      "accountTier": "growth",
+      "assignedRep": { "id": "rep_priya", "name": "Priya R.", "email": "priya.r@yourco.com" },
+      "currentProducts": [],
+      "targetContacts": [],
+      "lastRunAt": null
+    },
+    {
+      "accountId": "acct_dominion",
+      "accountName": "Dominion Energy",
+      "domain": "dominionenergy.com",
+      "industry": "Energy & Utilities",
+      "crmTier": "Tier 1",
+      "accountTier": "strategic",
+      "assignedRep": { "id": "rep_priya", "name": "Priya R.", "email": "priya.r@yourco.com" },
+      "currentProducts": [],
+      "targetContacts": [],
+      "lastRunAt": null
+    },
+    {
+      "accountId": "acct_hope_gas",
+      "accountName": "Hope Gas Holdings",
+      "domain": "hopegas.com",
+      "industry": "Energy & Utilities (Natural Gas)",
+      "crmTier": "Tier 3",
+      "accountTier": "growth",
+      "assignedRep": { "id": "rep_priya", "name": "Priya R.", "email": "priya.r@yourco.com" },
+      "currentProducts": [],
+      "targetContacts": [],
+      "lastRunAt": null
+    },
+    {
+      "accountId": "acct_markel",
+      "accountName": "Markel",
+      "domain": "markel.com",
+      "industry": "Insurance",
+      "crmTier": "Tier 3",
+      "accountTier": "growth",
+      "assignedRep": { "id": "rep_marcus", "name": "Marcus L.", "email": "marcus.l@yourco.com" },
+      "currentProducts": [],
+      "targetContacts": [],
+      "lastRunAt": null
+    },
+    {
+      "accountId": "acct_gw_mfa",
+      "accountName": "GW Medical Faculty Associates",
+      "domain": "gwdocs.com",
+      "industry": "Healthcare",
+      "crmTier": "Tier 4",
+      "accountTier": "growth",
+      "assignedRep": { "id": "rep_marcus", "name": "Marcus L.", "email": "marcus.l@yourco.com" },
+      "currentProducts": [],
+      "targetContacts": [],
+      "lastRunAt": null
     }
   ]
 }