Melee - Making The Best Of A Bad Deal
A Lore Oracle is never going to be a great meleer - if you really think you're going to be front lining a lot you might want to switch to Battle or similar. In the end, a Lore Oracle isn't really more suitable for melee than a sorcerer, but you can certainly do it if you want to.
Lore for Defense Only
You are not going to be an effective general melee damage dealer regardless of what you do. If you just need to occupy a hole in the front rank, however, you can rely on a super high AC to simply be a blocker. The problem here is that while your AC is very high for level 1, it's not going to increase with level as much as some other builds, or at least without aggressive investment in it. It will also rain on your spellcasting parade a bit because you'll be provoking AoOs. You will absolutely want Protection from Evil (much better than SoF for the first six levels and arguably even thereafter) going and will need to convince your party to do hurry-up offense while it's going.
Your damage will be helpful for the first about three levels, and then it'll be a drop in the bucket compared to everyone else's. You could just fight defensively and max AC without even bothering to attack, or - you could take Sanctuary and cast it and stand in the front line - many opponents won't be able to attack you at all. This fills a hole but all those attacks will just fall on the bear instead - of course, you'll be there to heal her, but melee damage >> healing over time. You have Int 13 and qualify for Combat Expertise - if you really want to burn feats on melee you should take this to further boost your AC, and then you can add on other subsidiary feats that will let you mess with people without having to actually deal a lot of damage (Imp. Disarm, Trip, Steal, Reposition).
Your first investments in gear should be masterwork armor, mithral armor (chain shirt), magic armor, amulet of natural armor, etc. I'm not sure why you're not using studded leather already, its max dex is +5? And Charisma buffers will give you double benefits. For your second spell, either have it be something actual Lore Oracle-y like Comprehend Languages, but if you are going full melee I'd say Divine Favor over Magic Weapon, as MW will start becoming irrelevant really fast as soon as you get masterwork/magic weaponry. But if you are spending all your feat and spell and everything selections on melee you'll be happier choosing a real melee character.
In fact, you know what? Part of the Lore Oracle's schtick is getting wizard spells eventually. If you invested in Use Magic Device you could use Mage Armor off a wand or whatnot and eliminate armor entirely; you'll be wanting to use Eagle's Splendor and the like to boost AC and spellcasting starting at level 3 so may as well. Then get a hot outfit like the iconic's.
Also, it doesn't hurt to ask your GM for some favors. "Hey man, looks like I'm roped into front lining... Can I get my deity's weapon as a proficiency or something at least?"
Once you hit level 2, see how it's really going. Are you really meleeing a lot? If so, consider a one level dip in e.g. fighter to get all the armor/weapon profs. Maybe the bear becomes Large and occupies the front line just fine, maybe someone gets murdered and rolls a barbarian, etc. Don't commit a light spell character to a permanent melee role too prematurely; hedge your bets in your level 1 build.
Stacking the Deck - Summoning
Monster Summoning and other battlefield control stuff can be used to "fill a hole in the front rank" reliably. This frees you up to be more of a proper caster and get into the sweet spot of buff/debuff/healing land. It's still good that you have the AC because you'll be subbing in on the front line when you don't have a summon.
I would probably go this route if you're OK with handling the complexity of summoning. There's an iPhone app for it actually called Summoner that has all the PFRPG creature stats in it and ready to go. The Augment Summoning feat beefs this up a lot - it does have Spell Focus: Conjuration as a prereq but guess what other spells are Conjuration - all your healing spells! If you plan on casting them offensively (like vs. undead) it'll help with that.
Then you can focus on being an Oracle. Take Extra Revelation as your other feats. Take Arcane Archivist as soon as you qualify at level 11.
Metamagic feats are generally a trap. With your limited spell selection, I might take Heighten Spell if you have favorite tricks you'd like to work on higher level opponents, but that's about it.
The other characters aren't likely to be super smart, so you need to focus on your Lore-ness and not just melee - you are going to be the sage of the group. Let the sorcerer pick up some of the fight if you have to; you should be the one with the Knowledge out the yinyang and all the decipher-stuff spells.