feat: add Pinecone vector database driver

[Siyet]

Summary

• Full PineconeDriver implementation using @pinecone-database/pinecone SDK — browse indexes and namespaces, query vectors by similarity, upsert/delete vectors, view index statistics
• Integrated across all touchpoints: connection form (API key field, no host/port), driver factory, MCP standalone server, import service (DBeaver + DataGrip), tree view (namespace icon), webpack externals
• Custom command syntax via parsePineconeCommand: QUERY <index> vector=[...] topK=N, UPSERT <index> id=... vector=[...], DELETE <index> ids=[...], STATS <index>, LIST <index>

Closes #15

Assumptions

• API key stored as config.password. Pinecone uses API key auth with no username. The connection form shows a dedicated "API Key" field that maps to the password field internally, consistent with how Redis stores its password.
• No host/port fields. Pinecone is a managed cloud service; the SDK resolves endpoints from the API key. The connection form hides host/port/SSL/proxy when Pinecone is selected.
• Custom command parser, not SQL. Like Redis, Pinecone doesn't use SQL. The execute() method parses a custom syntax: COMMAND index-name key=value .... JSON arrays/objects in params are supported for vectors, metadata, and filters.
• Lazy require. The @pinecone-database/pinecone SDK is loaded via lazy require() to avoid blocking extension activation, following the same pattern as other drivers.
• Icon uses next available font character. \E005 is used for the viewstor-pinecone icon in the existing viewstor-icons.woff2 font. If the glyph doesn't exist yet, the icon will fall back to the default; the font file needs a corresponding glyph added separately.
• No Grafana export. Pinecone has no Grafana datasource plugin, so it's excluded from DB_TYPE_TO_GRAFANA_DS.
• No safe mode. Pinecone doesn't support EXPLAIN, so safe mode checks are not applicable (the existing isSafeModeDB check already excludes unknown types).
• Mock-based tests only. No free tier suitable for CI; unit tests cover the command parser (12 tests) and driver contract verification.

Manual test cases

• Golden path: Add Connection → select "Pinecone" → enter API key → Test Connection → Save → expand tree (indexes with dimension/metric detail, namespaces with vector counts) → click an index → Result Panel shows id/values/metadata columns
• Query vectors: Open query editor on Pinecone connection → QUERY my-index vector=[0.1,0.2,0.3] topK=5 → results show id, score, truncated values, metadata JSON
• Upsert: UPSERT my-index id=test-1 vector=[0.1,0.2] metadata={"key":"val"} → success message
• Delete: DELETE my-index ids=["test-1"] → success message with count
• Stats: STATS my-index → table with total vectors, dimension, metric, namespaces, index fullness
• List: LIST my-index namespace=ns1 prefix=doc_ limit=10 → list of vector IDs
• Read-only mode: Mark connection read-only → upsert/delete should fail at the host level (readonly check)
• Invalid command: SELECT * FROM my-index → error message with supported command syntax
• MCP: add_connection with type: "pinecone", password: "<api-key>" → connection created successfully

Checklist

• README — added Pinecone row to Supported Databases table
• CHANGELOG — added entry under [Unreleased] > Added
• CLAUDE.md — updated "What is Viewstor", Drivers list, Key Conventions with Pinecone-specific notes
• l10n — extension description includes Pinecone
• Wiki — new Pinecone driver section (note: cannot push wiki from PR)

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Generated by Claude Code

[Siyet]

Fixes pushed

• 8d85d6e — Replace regex-based param parser with bracket-counting parser that handles nested JSON (e.g. filter={"$and":[{"a":1},{"b":2}]}). Added 2 test cases.
• d55e08e — Add Pinecone read commands (QUERY, STATS, LIST) to READ_VERB_RE so read-only connections can execute them via MCP. Updated error message. Added 3 test cases.

Issues to address

• src/drivers/pinecone.ts:1 — Top-level import { DatabaseDriver } is consistent with other drivers, but the PineconeDriver import in src/drivers/index.ts:7 eagerly loads the entire pinecone.ts module at extension activation. For a cloud-only SDK unlikely to be installed on most machines, consider a lazy require() in the factory's case 'pinecone': branch (matching the lazy pattern already inside the driver itself).
• package.json — The viewstor-pinecone icon references \\E005 in viewstor-icons.woff2, but the PR doesn't add a glyph to the font file. The icon will silently fall back to nothing until the font is updated.
• src/drivers/pinecone.ts:233 — executeQuery uses parsed.params.topk || parsed.params.topK to handle case variants, but all other params are case-sensitive. Consider normalizing param keys to lowercase in the parser for consistency.

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Generated by Claude Code